Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 820 · 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.🧩 Arjun is 10 years old. Vihaan is older than Arjun. How old is Vihaan? (a) 12 (b) 15 (c) 11 (d) not enough info
2. 2.🔬 Why do scientists repeat an experiment? (a) to waste time (b) to be sure of results (c) for fun only (d) to change answers
3. 3.🧩 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
4. 4.🧩 Vihaan bought 3 pens for ₹150 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹50 (c) ₹55 (d) ₹150
5. 5.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
6. 6.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
7. 7.True or false: “One mango in the box was sour, so all the mangoes are sour.” does not give enough evidence. (a) False (b) True
8. 8.🧩 Vihaan bought 4 markers for ₹100 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹25 (c) ₹30 (d) ₹100
9. 9.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
10. 10.🧩 Before solving a word problem, first check… (a) your handwriting (b) the page number (c) the colour of ink (d) what facts are given
11. 11.🧩 The film starts at 6 PM and lasts 3 hours. When does it end? (a) 9 PM (b) 10 PM (c) 6 PM (d) not enough info
12. 12.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) not enough evidence (b) enough evidence
13. 13.🧩 Diya is 10 years old. Meera is older than Diya. How old is Meera? (a) 11 (b) 15 (c) 12 (d) not enough info
14. 14.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
15. 15.🧩 A box of apples has 5 in each row. How many apples are in the box? (a) not enough info (b) 10 (c) 5 (d) 50
16. 16.🧩 A box has 4 rows of laddoos, with 5 in each row. How many laddoos are in the box? (a) 25 (b) 20 (c) 9 (d) not enough info
17. 17.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
18. 18.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
19. 19.🧩 Meera is 10 years old. Arjun is 8 years older than Meera. How old is Arjun? (a) 18 (b) not enough info (c) 8 (d) 19
20. 20.🧩 Ishaan bought 5 notebooks and a lunch box for ₹290 in all. Each notebook cost the same. What did one notebook cost? (a) ₹285 (b) ₹290 (c) not enough info (d) ₹58
21. 21.🧩 A box of apples has 4 in each row. How many apples are in the box? (a) 8 (b) not enough info (c) 40 (d) 4
22. 22.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no, check more (b) yes, it is certain (c) no mango is sweet (d) yes, mangoes match
23. 23.🧩 Tara bought 6 markers and a water bottle for ₹160 in all. Each marker cost the same. What did one marker cost? (a) ₹26 (b) ₹154 (c) not enough info (d) ₹160
24. 24.🧩 Nisha is 9 years old. Diya is 4 years older than Nisha. How old is Diya? (a) 4 (b) 13 (c) not enough info (d) 14
25. 25.🧩 Ishaan bought 3 kites and a lunch box for ₹130 in all. Each kite cost the same. What did one kite cost? (a) ₹127 (b) ₹130 (c) ₹43 (d) not enough info
26. 26.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
27. 27.🧩 A box has 8 rows of oranges, with 9 in each row. How many oranges are in the box? (a) not enough info (b) 17 (c) 72 (d) 81
28. 28.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) all dogs are mean (c) that one dog barked (d) never see dogs
29. 29.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
30. 30.📝 What does “evidence” mean? (a) facts that support it (b) a guess (c) a rumour (d) a loud opinion
31. 31.🧩 A box has 8 rows of laddoos, with 5 in each row. How many laddoos are in the box? (a) 13 (b) 45 (c) not enough info (d) 40
32. 32.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) asking the whole class (c) guessing (d) asking one friend
33. 33.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) 6 PM (b) not enough info (c) 5 PM (d) 4 PM
34. 34.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
35. 35.🧩 A box has 8 rows of mangoes, with 6 in each row. How many mangoes are in the box? (a) 54 (b) 48 (c) 14 (d) not enough info
36. 36.🧩 Vihaan bought 4 kites for ₹220 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹60 (c) ₹55 (d) ₹220
37. 37.🧩 Kabir is 10 years old. Saanvi is 6 years older than Kabir. How old is Saanvi? (a) 16 (b) 6 (c) 17 (d) not enough info
38. 38.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True
39. 39.🧩 Vihaan bought 6 kites and a cap for ₹150 in all. Each kite cost the same. What did one kite cost? (a) ₹25 (b) ₹150 (c) not enough info (d) ₹144
40. 40.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) False (b) True

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