Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 535 · 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.🧩 A box has 5 rows of mangoes, with 4 in each row. How many mangoes are in the box? (a) 9 (b) 24 (c) 20 (d) not enough info
2. 2.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
3. 3.🧩 Tara bought 5 pens for ₹250 in all. Each pen cost the same. What did one pen cost? (a) ₹250 (b) ₹50 (c) not enough info (d) ₹55
4. 4.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
5. 5.📝 What does “evidence” mean? (a) a loud opinion (b) a guess (c) facts that support it (d) a rumour
6. 6.🐕 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
7. 7.🧩 Saanvi is 8 years old. Rohan is older than Saanvi. How old is Rohan? (a) not enough info (b) 13 (c) 9 (d) 10
8. 8.🧩 Rohan is 6 years old. Aarav is 6 years older than Rohan. How old is Aarav? (a) not enough info (b) 6 (c) 12 (d) 13
9. 9.🧩 Before solving a word problem, first check… (a) what facts are given (b) the colour of ink (c) your handwriting (d) the page number
10. 10.🧩 Aarav is 11 years old. Vihaan is 4 years older than Aarav. How old is Vihaan? (a) not enough info (b) 4 (c) 16 (d) 15
11. 11.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
12. 12.🧩 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
13. 13.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) not enough info (b) 4 PM (c) 2 PM (d) 5 PM
14. 14.🧩 A box has 8 rows of mangoes, with 8 in each row. How many mangoes are in the box? (a) 16 (b) 64 (c) 72 (d) not enough info
15. 15.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
16. 16.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) False (b) True
17. 17.🧩 Saanvi bought 2 notebooks for ₹90 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹90 (c) ₹45 (d) ₹50
18. 18.🧩 Rohan is 8 years old. Diya is 6 years older than Rohan. How old is Diya? (a) 6 (b) 15 (c) 14 (d) not enough info
19. 19.🥭 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) yes, it is certain (c) no mango is sweet (d) yes, mangoes match
20. 20.🧩 Diya is 6 years old. Ishaan is older than Diya. How old is Ishaan? (a) 7 (b) 11 (c) not enough info (d) 8
21. 21.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to be sure of results (c) to change answers (d) to waste time
22. 22.🧩 A box of oranges has 6 in each row. How many oranges are in the box? (a) not enough info (b) 12 (c) 60 (d) 6
23. 23.🧩 Ananya bought 6 kites for ₹180 in all. Each kite cost the same. What did one kite cost? (a) ₹180 (b) not enough info (c) ₹30 (d) ₹35
24. 24.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) True (b) False
25. 25.🧩 Meera is 12 years old. Ishaan is 9 years older than Meera. How old is Ishaan? (a) 21 (b) not enough info (c) 22 (d) 9
26. 26.🧩 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
27. 27.🧩 A box has 5 rows of apples, with 6 in each row. How many apples are in the box? (a) 36 (b) 30 (c) not enough info (d) 11
28. 28.🧩 Ananya bought 4 notebooks for ₹220 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹55 (c) ₹220 (d) ₹60
29. 29.🧩 Tara is 7 years old. Aarav is older than Tara. How old is Aarav? (a) 8 (b) not enough info (c) 9 (d) 12
30. 30.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
31. 31.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) asking the whole class (c) guessing (d) asking your pet
32. 32.🧩 Rohan is 8 years old. Vihaan is 9 years older than Rohan. How old is Vihaan? (a) 17 (b) 18 (c) 9 (d) not enough info
33. 33.🧩 Diya bought 2 markers for ₹60 in all. Each marker cost the same. What did one marker cost? (a) ₹35 (b) not enough info (c) ₹60 (d) ₹30
34. 34.🧩 Saanvi bought 2 pens and a lunch box for ₹150 in all. Each pen cost the same. What did one pen cost? (a) ₹148 (b) ₹150 (c) ₹75 (d) not enough info
35. 35.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
36. 36.🧩 Meera is 7 years old. Kabir is older than Meera. How old is Kabir? (a) not enough info (b) 9 (c) 8 (d) 12
37. 37.🧩 The film starts at 4 PM and lasts 3 hours. When does it end? (a) 4 PM (b) 7 PM (c) not enough info (d) 8 PM
38. 38.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 8 PM (b) 7 PM (c) 6 PM (d) not enough info
39. 39.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
40. 40.🧩 Kabir bought 2 markers for ₹40 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹40 (c) ₹20 (d) ₹25

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