Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 75 · 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.🧩 Diya bought 5 markers for ₹250 in all. Each marker cost the same. What did one marker cost? (a) ₹250 (b) not enough info (c) ₹55 (d) ₹50
2. 2.🧩 The film starts at 6 PM and lasts 2 hours. When does it end? (a) 9 PM (b) 6 PM (c) not enough info (d) 8 PM
3. 3.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
4. 4.🧩 Kabir is 12 years old. Tara is 3 years older than Kabir. How old is Tara? (a) 15 (b) 16 (c) not enough info (d) 3
5. 5.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
6. 6.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 7 PM (b) 6 PM (c) not enough info (d) 5 PM
7. 7.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
8. 8.🧩 Tara is 12 years old. Meera is 9 years older than Tara. How old is Meera? (a) 9 (b) 21 (c) not enough info (d) 22
9. 9.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
10. 10.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) False (b) True
11. 11.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) not enough evidence (b) enough evidence
12. 12.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) False (b) True
13. 13.📝 What does “evidence” mean? (a) a guess (b) a rumour (c) facts that support it (d) a loud opinion
14. 14.🧩 Tara is 12 years old. Meera is 5 years older than Tara. How old is Meera? (a) 17 (b) not enough info (c) 5 (d) 18
15. 15.🔬 Why do scientists repeat an experiment? (a) to change answers (b) for fun only (c) to be sure of results (d) to waste time
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.🧩 Kabir bought 2 mangoes and a water bottle for ₹110 in all. Each mango cost the same. What did one mango cost? (a) ₹108 (b) ₹55 (c) not enough info (d) ₹110
18. 18.🧩 Tara is 6 years old. Meera is 3 years older than Tara. How old is Meera? (a) 3 (b) not enough info (c) 9 (d) 10
19. 19.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
20. 20.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
21. 21.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
22. 22.🧩 A box of oranges has 5 in each row. How many oranges are in the box? (a) 50 (b) 10 (c) not enough info (d) 5
23. 23.🧩 Nisha bought 5 kites for ₹225 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹45 (c) ₹225 (d) ₹50
24. 24.🥭 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) yes, mangoes match (c) no, check more (d) yes, it is certain
25. 25.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
26. 26.🧩 A box has 6 rows of laddoos, with 5 in each row. How many laddoos are in the box? (a) not enough info (b) 30 (c) 11 (d) 35
27. 27.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
28. 28.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) asking your pet (c) asking the whole class (d) guessing
29. 29.🧩 A box of apples has 9 in each row. How many apples are in the box? (a) 9 (b) 18 (c) not enough info (d) 90
30. 30.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
31. 31.🧩 Aarav is 6 years old. Ishaan is older than Aarav. How old is Ishaan? (a) not enough info (b) 11 (c) 7 (d) 8
32. 32.🧩 Aarav bought 5 balls and a lunch box for ₹370 in all. Each ball cost the same. What did one ball cost? (a) ₹365 (b) not enough info (c) ₹74 (d) ₹370
33. 33.🧩 Aarav bought 5 pens for ₹150 in all. Each pen cost the same. What did one pen cost? (a) ₹35 (b) not enough info (c) ₹30 (d) ₹150
34. 34.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
35. 35.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 9 PM (b) 8 PM (c) 7 PM (d) not enough info
36. 36.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 5 PM (b) 4 PM (c) not enough info (d) 6 PM
37. 37.🧩 A box has 8 rows of eggs, with 9 in each row. How many eggs are in the box? (a) not enough info (b) 17 (c) 72 (d) 81
38. 38.🧩 Ishaan is 11 years old. Aarav is older than Ishaan. How old is Aarav? (a) 13 (b) 16 (c) 12 (d) not enough info
39. 39.🧩 Vihaan is 10 years old. Arjun is older than Vihaan. How old is Arjun? (a) 11 (b) not enough info (c) 15 (d) 12
40. 40.🧩 A box has 5 rows of mangoes, with 8 in each row. How many mangoes are in the box? (a) not enough info (b) 13 (c) 48 (d) 40

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