Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 631 · 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.🧩 Before solving a word problem, first check… (a) your handwriting (b) the page number (c) the colour of ink (d) what facts are given
2. 2.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 6 PM (b) not enough info (c) 8 PM (d) 7 PM
3. 3.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) True (b) False
4. 4.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
5. 5.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
6. 6.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) dogs hate you (c) that one dog barked (d) never see dogs
7. 7.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
8. 8.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
9. 9.🧩 Aarav bought 3 kites for ₹165 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹165 (c) ₹60 (d) ₹55
10. 10.🧩 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
11. 11.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) False (b) True
12. 12.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
13. 13.🧩 Diya is 6 years old. Rohan is older than Diya. How old is Rohan? (a) 8 (b) not enough info (c) 11 (d) 7
14. 14.🧩 Vihaan is 11 years old. Diya is older than Vihaan. How old is Diya? (a) not enough info (b) 13 (c) 16 (d) 12
15. 15.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
16. 16.🥭 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) yes, mangoes match (c) no mango is sweet (d) no, check more
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.🧩 Vihaan bought 6 notebooks for ₹60 in all. Each notebook cost the same. What did one notebook cost? (a) ₹15 (b) ₹60 (c) ₹10 (d) not enough info
19. 19.🧩 Ishaan is 11 years old. Meera is 6 years older than Ishaan. How old is Meera? (a) 6 (b) not enough info (c) 18 (d) 17
20. 20.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
21. 21.🧩 The film starts at 4 PM and lasts 2 hours. When does it end? (a) 7 PM (b) not enough info (c) 4 PM (d) 6 PM
22. 22.🧩 Nisha bought 5 pens and a bag for ₹135 in all. Each pen cost the same. What did one pen cost? (a) ₹130 (b) not enough info (c) ₹135 (d) ₹27
23. 23.🧩 A box has 4 rows of eggs, with 8 in each row. How many eggs are in the box? (a) 12 (b) not enough info (c) 40 (d) 32
24. 24.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
25. 25.🧩 A box of guavas has 9 in each row. How many guavas are in the box? (a) 18 (b) 90 (c) 9 (d) not enough info
26. 26.🧩 The film starts at 2 PM and lasts 3 hours. When does it end? (a) 5 PM (b) 2 PM (c) not enough info (d) 6 PM
27. 27.🧩 A box has 6 rows of mangoes, with 6 in each row. How many mangoes are in the box? (a) 12 (b) not enough info (c) 42 (d) 36
28. 28.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 6 PM (b) 5 PM (c) not enough info (d) 7 PM
29. 29.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) False (b) True
30. 30.🧩 A box has 8 rows of mangoes, with 4 in each row. How many mangoes are in the box? (a) 12 (b) not enough info (c) 36 (d) 32
31. 31.🔬 Why do scientists repeat an experiment? (a) to be sure of results (b) to change answers (c) to waste time (d) for fun only
32. 32.🧩 Ishaan bought 6 markers and a water bottle for ₹220 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹214 (c) ₹36 (d) ₹220
33. 33.🧩 A box has 3 rows of guavas, with 9 in each row. How many guavas are in the box? (a) not enough info (b) 12 (c) 27 (d) 36
34. 34.🧩 Ananya bought 5 notebooks for ₹300 in all. Each notebook cost the same. What did one notebook cost? (a) ₹65 (b) not enough info (c) ₹300 (d) ₹60
35. 35.🧩 Vihaan bought 2 mangoes and a bag for ₹130 in all. Each mango cost the same. What did one mango cost? (a) ₹128 (b) not enough info (c) ₹65 (d) ₹130
36. 36.🧩 The film starts at 3 PM and lasts 3 hours. When does it end? (a) 7 PM (b) 6 PM (c) not enough info (d) 3 PM
37. 37.🧩 Kabir bought 4 notebooks and a cap for ₹100 in all. Each notebook cost the same. What did one notebook cost? (a) ₹100 (b) ₹96 (c) not enough info (d) ₹25
38. 38.🧩 Arjun bought 4 markers and a water bottle for ₹310 in all. Each marker cost the same. What did one marker cost? (a) ₹310 (b) not enough info (c) ₹306 (d) ₹77
39. 39.🧩 Nisha bought 3 notebooks for ₹150 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹150 (c) ₹55 (d) ₹50
40. 40.🧩 Aarav bought 3 pens for ₹75 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹75 (c) ₹30 (d) ₹25

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