Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 529 · 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 bought 4 balls for ₹40 in all. Each ball cost the same. What did one ball cost? (a) ₹10 (b) ₹40 (c) ₹15 (d) not enough info
2. 2.🧩 Tara bought 3 markers for ₹180 in all. Each marker cost the same. What did one marker cost? (a) ₹60 (b) ₹180 (c) not enough info (d) ₹65
3. 3.📝 What does “evidence” mean? (a) a rumour (b) facts that support it (c) a guess (d) a loud opinion
4. 4.🧩 Aarav bought 4 mangoes and a water bottle for ₹140 in all. Each mango cost the same. What did one mango cost? (a) ₹35 (b) ₹136 (c) not enough info (d) ₹140
5. 5.🧩 Aarav is 8 years old. Meera is 3 years older than Aarav. How old is Meera? (a) 3 (b) 12 (c) not enough info (d) 11
6. 6.🧩 Vihaan is 7 years old. Ananya is older than Vihaan. How old is Ananya? (a) 12 (b) not enough info (c) 8 (d) 9
7. 7.🧩 A box of apples has 5 in each row. How many apples are in the box? (a) 10 (b) 5 (c) not enough info (d) 50
8. 8.🧩 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
9. 9.🔬 Why do scientists repeat an experiment? (a) to change answers (b) to be sure of results (c) to waste time (d) for fun only
10. 10.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
11. 11.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
12. 12.🧩 Diya bought 3 balls and a cap for ₹165 in all. Each ball cost the same. What did one ball cost? (a) ₹55 (b) ₹162 (c) ₹165 (d) not enough info
13. 13.🧩 Ananya bought 6 balls for ₹210 in all. Each ball cost the same. What did one ball cost? (a) ₹210 (b) not enough info (c) ₹35 (d) ₹40
14. 14.🧩 Rohan is 8 years old. Ishaan is 3 years older than Rohan. How old is Ishaan? (a) 12 (b) not enough info (c) 11 (d) 3
15. 15.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
16. 16.🧩 Diya is 6 years old. Meera is 3 years older than Diya. How old is Meera? (a) not enough info (b) 10 (c) 9 (d) 3
17. 17.🧩 Ishaan bought 4 notebooks and a lunch box for ₹100 in all. Each notebook cost the same. What did one notebook cost? (a) ₹25 (b) not enough info (c) ₹96 (d) ₹100
18. 18.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
19. 19.🥭 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) no, check more (c) no mango is sweet (d) yes, mangoes match
20. 20.🧩 A box of guavas has 6 in each row. How many guavas are in the box? (a) 6 (b) not enough info (c) 12 (d) 60
21. 21.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
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.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
24. 24.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
25. 25.🧩 Aarav is 7 years old. Ananya is 8 years older than Aarav. How old is Ananya? (a) 8 (b) 16 (c) not enough info (d) 15
26. 26.🧩 Arjun bought 4 mangoes for ₹180 in all. Each mango cost the same. What did one mango cost? (a) ₹180 (b) not enough info (c) ₹45 (d) ₹50
27. 27.🧩 Ananya is 9 years old. Diya is 9 years older than Ananya. How old is Diya? (a) 9 (b) not enough info (c) 19 (d) 18
28. 28.🧩 A box has 4 rows of mangoes, with 9 in each row. How many mangoes are in the box? (a) 13 (b) 45 (c) 36 (d) not enough info
29. 29.🧩 A box has 4 rows of oranges, with 5 in each row. How many oranges are in the box? (a) 9 (b) 20 (c) 25 (d) not enough info
30. 30.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
31. 31.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
32. 32.🧩 Ananya bought 4 markers for ₹40 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹10 (c) ₹15 (d) ₹40
33. 33.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
34. 34.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
35. 35.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
36. 36.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
37. 37.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
38. 38.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
39. 39.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) False (b) True
40. 40.🧩 A box has 3 rows of laddoos, with 7 in each row. How many laddoos are in the box? (a) 10 (b) 21 (c) not enough info (d) 28

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