Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 392 · 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.🧩 Kabir is 6 years old. Nisha is 9 years older than Kabir. How old is Nisha? (a) 16 (b) 9 (c) 15 (d) not enough info
2. 2.🧩 Vihaan is 7 years old. Kabir is 2 years older than Vihaan. How old is Kabir? (a) 9 (b) 2 (c) not enough info (d) 10
3. 3.🧩 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
4. 4.🧩 Arjun is 7 years old. Aarav is 7 years older than Arjun. How old is Aarav? (a) 14 (b) 7 (c) 15 (d) not enough info
5. 5.🧩 Diya is 9 years old. Ishaan is 6 years older than Diya. How old is Ishaan? (a) 6 (b) not enough info (c) 16 (d) 15
6. 6.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
7. 7.🧩 The film starts at 3 PM and lasts 2 hours. When does it end? (a) not enough info (b) 3 PM (c) 5 PM (d) 6 PM
8. 8.🧩 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
9. 9.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 8 PM (b) 7 PM (c) not enough info (d) 9 PM
10. 10.🧩 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
11. 11.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
12. 12.🧩 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
13. 13.🥭 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) no mango is sweet (c) yes, mangoes match (d) yes, it is certain
14. 14.🧩 Kabir bought 2 mangoes for ₹110 in all. Each mango cost the same. What did one mango cost? (a) ₹60 (b) ₹55 (c) ₹110 (d) not enough info
15. 15.🧩 A box has 4 rows of mangoes, with 4 in each row. How many mangoes are in the box? (a) not enough info (b) 16 (c) 8 (d) 20
16. 16.🧩 The film starts at 6 PM and lasts 3 hours. When does it end? (a) 9 PM (b) 10 PM (c) not enough info (d) 6 PM
17. 17.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) not enough info (b) 5 PM (c) 6 PM (d) 4 PM
18. 18.🧩 Ananya bought 6 balls for ₹180 in all. Each ball cost the same. What did one ball cost? (a) ₹180 (b) ₹30 (c) not enough info (d) ₹35
19. 19.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
20. 20.🔬 Why do scientists repeat an experiment? (a) to be sure of results (b) to change answers (c) for fun only (d) to waste time
21. 21.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
22. 22.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) True (b) False
23. 23.🧩 A box of oranges has 7 in each row. How many oranges are in the box? (a) 70 (b) 14 (c) 7 (d) not enough info
24. 24.🧩 A box of eggs has 5 in each row. How many eggs are in the box? (a) 10 (b) 5 (c) 50 (d) not enough info
25. 25.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) False (b) True
26. 26.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
27. 27.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
28. 28.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
29. 29.🧩 Tara bought 4 pens for ₹220 in all. Each pen cost the same. What did one pen cost? (a) ₹220 (b) ₹60 (c) not enough info (d) ₹55
30. 30.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
31. 31.🧩 A box of eggs has 8 in each row. How many eggs are in the box? (a) 16 (b) not enough info (c) 80 (d) 8
32. 32.🧩 A box of apples has 6 in each row. How many apples are in the box? (a) 12 (b) not enough info (c) 60 (d) 6
33. 33.🧩 Kabir is 7 years old. Nisha is 7 years older than Kabir. How old is Nisha? (a) 15 (b) not enough info (c) 7 (d) 14
34. 34.🧩 Saanvi bought 3 balls and a water bottle for ₹210 in all. Each ball cost the same. What did one ball cost? (a) ₹210 (b) not enough info (c) ₹70 (d) ₹207
35. 35.🧩 A box of guavas has 5 in each row. How many guavas are in the box? (a) 50 (b) 10 (c) not enough info (d) 5
36. 36.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
37. 37.🧩 The film starts at 2 PM and lasts 3 hours. When does it end? (a) 5 PM (b) 2 PM (c) 6 PM (d) not enough info
38. 38.🧩 A box of laddoos has 9 in each row. How many laddoos are in the box? (a) 18 (b) 90 (c) 9 (d) not enough info
39. 39.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
40. 40.🧩 Vihaan bought 3 markers for ₹60 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹60 (c) ₹20 (d) ₹25

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