Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 153 · 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: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
2. 2.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
3. 3.🧩 Ishaan bought 6 kites for ₹330 in all. Each kite cost the same. What did one kite cost? (a) ₹55 (b) not enough info (c) ₹60 (d) ₹330
4. 4.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
5. 5.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) asking one friend (c) guessing (d) asking the whole class
6. 6.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
7. 7.🧩 Nisha bought 5 markers for ₹275 in all. Each marker cost the same. What did one marker cost? (a) ₹55 (b) ₹275 (c) not enough info (d) ₹60
8. 8.📝 What does “evidence” mean? (a) a rumour (b) a guess (c) a loud opinion (d) facts that support it
9. 9.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
10. 10.True or false: “My friend didn’t like the book, so the book is bad for everyone.” does not give enough evidence. (a) True (b) False
11. 11.🧩 Nisha is 11 years old. Aarav is 7 years older than Nisha. How old is Aarav? (a) 19 (b) 7 (c) 18 (d) not enough info
12. 12.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 5 PM (b) 4 PM (c) 3 PM (d) not enough info
13. 13.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 7 PM (b) 9 PM (c) 8 PM (d) not enough info
14. 14.🧩 A box of laddoos has 5 in each row. How many laddoos are in the box? (a) not enough info (b) 50 (c) 5 (d) 10
15. 15.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
16. 16.🧩 A box has 5 rows of apples, with 6 in each row. How many apples are in the box? (a) not enough info (b) 30 (c) 11 (d) 36
17. 17.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
18. 18.🧩 Before solving a word problem, first check… (a) the page number (b) the colour of ink (c) your handwriting (d) what facts are given
19. 19.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
20. 20.True or false: “One mango in the box was sour, so all the mangoes are sour.” does not give enough evidence. (a) True (b) False
21. 21.🧩 Ishaan bought 6 notebooks and a lunch box for ₹130 in all. Each notebook cost the same. What did one notebook cost? (a) ₹21 (b) ₹130 (c) ₹124 (d) not enough info
22. 22.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
23. 23.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True
24. 24.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
25. 25.🧩 Ananya bought 5 markers for ₹175 in all. Each marker cost the same. What did one marker cost? (a) ₹40 (b) ₹175 (c) not enough info (d) ₹35
26. 26.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) not enough info (b) 4 PM (c) 5 PM (d) 6 PM
27. 27.🧩 Vihaan bought 2 balls and a water bottle for ₹130 in all. Each ball cost the same. What did one ball cost? (a) ₹128 (b) ₹130 (c) ₹65 (d) not enough info
28. 28.🧩 Aarav bought 2 notebooks for ₹30 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹30 (c) ₹15 (d) ₹20
29. 29.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no mango is sweet (b) yes, mangoes match (c) no, check more (d) yes, it is certain
30. 30.🧩 Tara is 11 years old. Kabir is 8 years older than Tara. How old is Kabir? (a) 19 (b) 20 (c) 8 (d) not enough info
31. 31.🧩 Aarav bought 5 kites for ₹50 in all. Each kite cost the same. What did one kite cost? (a) ₹15 (b) not enough info (c) ₹10 (d) ₹50
32. 32.🧩 Tara bought 2 kites for ₹60 in all. Each kite cost the same. What did one kite cost? (a) ₹60 (b) not enough info (c) ₹30 (d) ₹35
33. 33.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
34. 34.🧩 Aarav bought 6 pens and a water bottle for ₹160 in all. Each pen cost the same. What did one pen cost? (a) ₹154 (b) ₹160 (c) ₹26 (d) not enough info
35. 35.🧩 A box has 3 rows of apples, with 8 in each row. How many apples are in the box? (a) 24 (b) not enough info (c) 11 (d) 32
36. 36.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) not enough evidence (b) enough evidence
37. 37.🔬 Why do scientists repeat an experiment? (a) to be sure of results (b) for fun only (c) to change answers (d) to waste time
38. 38.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
39. 39.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) 7 PM (b) not enough info (c) 6 PM (d) 8 PM
40. 40.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

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