Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 304 · 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.🧩 Aarav is 9 years old. Kabir is older than Aarav. How old is Kabir? (a) 11 (b) 10 (c) not enough info (d) 14
2. 2.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
3. 3.🧩 Aarav bought 5 balls and a water bottle for ₹310 in all. Each ball cost the same. What did one ball cost? (a) ₹310 (b) not enough info (c) ₹305 (d) ₹62
4. 4.🧩 Before solving a word problem, first check… (a) what facts are given (b) the colour of ink (c) the page number (d) your handwriting
5. 5.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (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) no mango is sweet (b) no, check more (c) yes, it is certain (d) yes, mangoes match
7. 7.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
8. 8.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) all dogs are mean (c) dogs hate you (d) that one dog barked
9. 9.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
10. 10.🧩 Saanvi is 7 years old. Arjun is older than Saanvi. How old is Arjun? (a) not enough info (b) 9 (c) 12 (d) 8
11. 11.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
12. 12.🧩 Diya bought 5 pens and a bag for ₹270 in all. Each pen cost the same. What did one pen cost? (a) ₹270 (b) ₹265 (c) ₹54 (d) not enough info
13. 13.🧩 The film starts at 4 PM and lasts 3 hours. When does it end? (a) not enough info (b) 7 PM (c) 4 PM (d) 8 PM
14. 14.🧩 A box of laddoos has 9 in each row. How many laddoos are in the box? (a) 9 (b) 18 (c) not enough info (d) 90
15. 15.🧩 Ishaan is 7 years old. Arjun is older than Ishaan. How old is Arjun? (a) 9 (b) not enough info (c) 8 (d) 12
16. 16.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
17. 17.🧩 The film starts at 6 PM and lasts 3 hours. When does it end? (a) 6 PM (b) not enough info (c) 10 PM (d) 9 PM
18. 18.🧩 Ishaan is 11 years old. Ananya is older than Ishaan. How old is Ananya? (a) 13 (b) 12 (c) not enough info (d) 16
19. 19.🧩 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
20. 20.🧩 Vihaan is 9 years old. Rohan is older than Vihaan. How old is Rohan? (a) 14 (b) 10 (c) not enough info (d) 11
21. 21.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
22. 22.🧩 Vihaan is 7 years old. Arjun is 8 years older than Vihaan. How old is Arjun? (a) 15 (b) 8 (c) 16 (d) not enough info
23. 23.🧩 A box of apples has 8 in each row. How many apples are in the box? (a) not enough info (b) 80 (c) 16 (d) 8
24. 24.🧩 A box has 5 rows of mangoes, with 7 in each row. How many mangoes are in the box? (a) 42 (b) 35 (c) not enough info (d) 12
25. 25.True or false: “One student said the canteen food was cold, so it is always cold.” does not give enough evidence. (a) True (b) False
26. 26.🧩 Kabir bought 6 notebooks for ₹60 in all. Each notebook cost the same. What did one notebook cost? (a) ₹60 (b) ₹10 (c) ₹15 (d) not enough info
27. 27.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
28. 28.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 7 PM (b) 6 PM (c) not enough info (d) 8 PM
29. 29.🔬 Why do scientists repeat an experiment? (a) to change answers (b) for fun only (c) to waste time (d) to be sure of results
30. 30.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True
31. 31.🧩 Kabir is 8 years old. Ishaan is older than Kabir. How old is Ishaan? (a) 10 (b) 9 (c) 13 (d) not enough info
32. 32.🧩 A box has 4 rows of oranges, with 4 in each row. How many oranges are in the box? (a) 20 (b) 8 (c) 16 (d) not enough info
33. 33.🧩 Aarav is 12 years old. Diya is older than Aarav. How old is Diya? (a) not enough info (b) 17 (c) 13 (d) 14
34. 34.🧩 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
35. 35.🧩 Tara bought 3 balls and a water bottle for ₹185 in all. Each ball cost the same. What did one ball cost? (a) ₹182 (b) ₹61 (c) not enough info (d) ₹185
36. 36.🧩 A box of mangoes has 6 in each row. How many mangoes are in the box? (a) 60 (b) not enough info (c) 12 (d) 6
37. 37.🧩 A box of laddoos has 4 in each row. How many laddoos are in the box? (a) 4 (b) 40 (c) not enough info (d) 8
38. 38.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) True (b) False
39. 39.🧩 Aarav bought 6 markers for ₹180 in all. Each marker cost the same. What did one marker cost? (a) ₹180 (b) ₹35 (c) ₹30 (d) not enough info
40. 40.🧩 A box has 8 rows of oranges, with 5 in each row. How many oranges are in the box? (a) not enough info (b) 45 (c) 40 (d) 13

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