Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 580 · 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.🧩 Tara is 6 years old. Rohan is 4 years older than Tara. How old is Rohan? (a) not enough info (b) 11 (c) 10 (d) 4
2. 2.🧩 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
3. 3.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) guessing (c) asking the whole class (d) asking your pet
4. 4.🧩 Diya bought 2 markers for ₹50 in all. Each marker cost the same. What did one marker cost? (a) ₹50 (b) not enough info (c) ₹25 (d) ₹30
5. 5.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
6. 6.🧩 A box of eggs has 4 in each row. How many eggs are in the box? (a) not enough info (b) 4 (c) 40 (d) 8
7. 7.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to change answers (c) to waste time (d) to be sure of results
8. 8.🧩 Diya bought 5 balls and a lunch box for ₹290 in all. Each ball cost the same. What did one ball cost? (a) ₹285 (b) ₹58 (c) ₹290 (d) not enough info
9. 9.🧩 A box has 4 rows of guavas, with 4 in each row. How many guavas are in the box? (a) 8 (b) 20 (c) 16 (d) not enough info
10. 10.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) 2 PM (b) 5 PM (c) not enough info (d) 4 PM
11. 11.🧩 The film starts at 3 PM and lasts 3 hours. When does it end? (a) 6 PM (b) 7 PM (c) 3 PM (d) not enough info
12. 12.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 6 PM (b) 7 PM (c) not enough info (d) 5 PM
13. 13.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
14. 14.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) not enough info (b) 4 PM (c) 5 PM (d) 3 PM
15. 15.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) yes, mangoes match (b) no mango is sweet (c) no, check more (d) yes, it is certain
16. 16.🧩 Aarav is 8 years old. Ishaan is 4 years older than Aarav. How old is Ishaan? (a) 13 (b) 4 (c) not enough info (d) 12
17. 17.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
18. 18.🧩 Rohan bought 3 kites for ₹135 in all. Each kite cost the same. What did one kite cost? (a) ₹45 (b) not enough info (c) ₹50 (d) ₹135
19. 19.🧩 Aarav bought 2 mangoes and a bag for ₹130 in all. Each mango cost the same. What did one mango cost? (a) ₹65 (b) ₹130 (c) ₹128 (d) not enough info
20. 20.🧩 Ananya bought 4 pens for ₹120 in all. Each pen cost the same. What did one pen cost? (a) ₹30 (b) ₹35 (c) ₹120 (d) not enough info
21. 21.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) not enough info (b) 8 PM (c) 9 PM (d) 7 PM
22. 22.🧩 Before solving a word problem, first check… (a) the page number (b) your handwriting (c) the colour of ink (d) what facts are given
23. 23.🧩 A box of eggs has 8 in each row. How many eggs are in the box? (a) not enough info (b) 16 (c) 80 (d) 8
24. 24.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
25. 25.🧩 Vihaan is 6 years old. Kabir is older than Vihaan. How old is Kabir? (a) 7 (b) 8 (c) 11 (d) not enough info
26. 26.🧩 A box has 3 rows of apples, with 4 in each row. How many apples are in the box? (a) 7 (b) 12 (c) not enough info (d) 16
27. 27.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
28. 28.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 7 PM (b) not enough info (c) 6 PM (d) 8 PM
29. 29.🧩 Aarav is 6 years old. Rohan is 6 years older than Aarav. How old is Rohan? (a) 6 (b) 12 (c) not enough info (d) 13
30. 30.🧩 Aarav bought 2 notebooks and a lunch box for ₹80 in all. Each notebook cost the same. What did one notebook cost? (a) ₹78 (b) ₹40 (c) not enough info (d) ₹80
31. 31.🧩 Aarav bought 4 kites and a lunch box for ₹200 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹200 (c) ₹196 (d) ₹50
32. 32.🧩 A box of mangoes has 4 in each row. How many mangoes are in the box? (a) 4 (b) 40 (c) not enough info (d) 8
33. 33.🧩 The film starts at 2 PM and lasts 3 hours. When does it end? (a) not enough info (b) 5 PM (c) 6 PM (d) 2 PM
34. 34.🧩 Ishaan is 11 years old. Vihaan is older than Ishaan. How old is Vihaan? (a) not enough info (b) 12 (c) 16 (d) 13
35. 35.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
36. 36.🧩 Aarav bought 2 mangoes for ₹30 in all. Each mango cost the same. What did one mango cost? (a) ₹20 (b) ₹30 (c) ₹15 (d) not enough info
37. 37.🧩 A box has 5 rows of laddoos, with 8 in each row. How many laddoos are in the box? (a) not enough info (b) 40 (c) 13 (d) 48
38. 38.🧩 A box has 8 rows of oranges, with 7 in each row. How many oranges are in the box? (a) 15 (b) 63 (c) not enough info (d) 56
39. 39.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) enough evidence (b) not enough evidence
40. 40.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence

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