Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 127 · 40 questions

Thinking tip (Enough facts, then decide): Not enough evidence: “One mango was sour, so all are sour.” Enough: “We checked all 40 mangoes; every one was ripe.” Before you answer, check every fact you need is given. 7 rows with 9 in each → 7 × 9 = 63. “A box has 9 in each row” with no number of rows → not enough info. Missing facts hide in words like “and a bag”, “older” (by how much?) and “a long film” (how long?).

1. 1.True or false: “My friend didn’t like the book, so the book is bad for everyone.” does not give enough evidence. (a) False (b) True
2. 2.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
3. 3.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) True (b) False
4. 4.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 8 PM (b) not enough info (c) 9 PM (d) 7 PM
5. 5.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
6. 6.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) yes, it is certain (b) no mango is sweet (c) no, check more (d) yes, mangoes match
7. 7.🧩 A box of laddoos has 9 in each row. How many laddoos are in the box? (a) 90 (b) 18 (c) 9 (d) not enough info
8. 8.🧩 Rohan bought 6 notebooks and a cap for ₹420 in all. Each notebook cost the same. What did one notebook cost? (a) ₹70 (b) not enough info (c) ₹414 (d) ₹420
9. 9.🧩 Meera bought 6 notebooks and a water bottle for ₹330 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹55 (c) ₹324 (d) ₹330
10. 10.🧩 Saanvi bought 6 mangoes for ₹120 in all. Each mango cost the same. What did one mango cost? (a) ₹120 (b) ₹25 (c) not enough info (d) ₹20
11. 11.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) enough evidence (b) not enough evidence
12. 12.📝 What does “evidence” mean? (a) a guess (b) facts that support it (c) a rumour (d) a loud opinion
13. 13.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking the whole class (c) asking one friend (d) asking your pet
14. 14.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
15. 15.🧩 The film starts at 3 PM and lasts 2 hours. When does it end? (a) not enough info (b) 6 PM (c) 5 PM (d) 3 PM
16. 16.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
17. 17.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
18. 18.🧩 Diya bought 4 notebooks for ₹80 in all. Each notebook cost the same. What did one notebook cost? (a) ₹80 (b) not enough info (c) ₹25 (d) ₹20
19. 19.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) True (b) False
20. 20.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) True (b) False
21. 21.🧩 Vihaan is 9 years old. Kabir is 7 years older than Vihaan. How old is Kabir? (a) 16 (b) 7 (c) not enough info (d) 17
22. 22.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
23. 23.🧩 A box has 5 rows of mangoes, with 8 in each row. How many mangoes are in the box? (a) 13 (b) 48 (c) not enough info (d) 40
24. 24.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) True (b) False
25. 25.🧩 Meera is 10 years old. Vihaan is 7 years older than Meera. How old is Vihaan? (a) 18 (b) 7 (c) 17 (d) not enough info
26. 26.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
27. 27.🧩 Before solving a word problem, first check… (a) the page number (b) the colour of ink (c) your handwriting (d) what facts are given
28. 28.🧩 Ishaan bought 6 notebooks and a lunch box for ₹100 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹16 (c) ₹100 (d) ₹94
29. 29.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
30. 30.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
31. 31.🧩 Diya is 10 years old. Vihaan is 2 years older than Diya. How old is Vihaan? (a) not enough info (b) 13 (c) 2 (d) 12
32. 32.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
33. 33.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
34. 34.🧩 A box has 7 rows of apples, with 4 in each row. How many apples are in the box? (a) 32 (b) not enough info (c) 11 (d) 28
35. 35.🔬 Why do scientists repeat an experiment? (a) to change answers (b) to be sure of results (c) to waste time (d) for fun only
36. 36.🧩 Saanvi is 7 years old. Rohan is older than Saanvi. How old is Rohan? (a) 9 (b) 12 (c) not enough info (d) 8
37. 37.🧩 Nisha bought 3 notebooks for ₹60 in all. Each notebook cost the same. What did one notebook cost? (a) ₹60 (b) not enough info (c) ₹20 (d) ₹25
38. 38.🧩 Kabir bought 2 balls for ₹40 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹40 (c) ₹20 (d) ₹25
39. 39.🧩 A box of guavas has 4 in each row. How many guavas are in the box? (a) 8 (b) not enough info (c) 40 (d) 4
40. 40.🧩 The film starts at 5 PM and lasts 3 hours. When does it end? (a) 8 PM (b) not enough info (c) 5 PM (d) 9 PM

Free critical thinking lessons, practice and worksheets at talentjr.in/critical-thinking-for-kids