Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 183 · 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 of mangoes has 7 in each row. How many mangoes are in the box? (a) 7 (b) not enough info (c) 14 (d) 70
2. 2.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) dogs hate you (c) all dogs are mean (d) that one dog barked
3. 3.🧩 A box has 4 rows of eggs, with 5 in each row. How many eggs are in the box? (a) 25 (b) 9 (c) not enough info (d) 20
4. 4.📝 What does “evidence” mean? (a) a rumour (b) facts that support it (c) a guess (d) a loud opinion
5. 5.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
6. 6.🧩 A box has 3 rows of eggs, with 5 in each row. How many eggs are in the box? (a) not enough info (b) 15 (c) 20 (d) 8
7. 7.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) False (b) True
8. 8.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
9. 9.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
10. 10.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
11. 11.🧩 Ishaan is 11 years old. Aarav is 4 years older than Ishaan. How old is Aarav? (a) 15 (b) 4 (c) not enough info (d) 16
12. 12.🧩 Vihaan is 11 years old. Rohan is 8 years older than Vihaan. How old is Rohan? (a) 20 (b) not enough info (c) 8 (d) 19
13. 13.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
14. 14.🧩 Diya is 12 years old. Nisha is older than Diya. How old is Nisha? (a) 14 (b) not enough info (c) 13 (d) 17
15. 15.🧩 Rohan is 11 years old. Arjun is 4 years older than Rohan. How old is Arjun? (a) 15 (b) 4 (c) not enough info (d) 16
16. 16.🧩 A box of oranges has 5 in each row. How many oranges are in the box? (a) 50 (b) not enough info (c) 10 (d) 5
17. 17.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) False (b) True
18. 18.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False
19. 19.🧩 Arjun is 9 years old. Meera is older than Arjun. How old is Meera? (a) 10 (b) not enough info (c) 11 (d) 14
20. 20.🔬 Why do scientists repeat an experiment? (a) to be sure of results (b) for fun only (c) to change answers (d) to waste time
21. 21.🧩 A box of mangoes has 8 in each row. How many mangoes are in the box? (a) 80 (b) 8 (c) 16 (d) not enough info
22. 22.🧩 Rohan is 9 years old. Diya is older than Rohan. How old is Diya? (a) 14 (b) 10 (c) 11 (d) not enough info
23. 23.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
24. 24.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) yes, mangoes match (b) no, check more (c) yes, it is certain (d) no mango is sweet
25. 25.🧩 Before solving a word problem, first check… (a) what facts are given (b) your handwriting (c) the page number (d) the colour of ink
26. 26.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
27. 27.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) not enough info (b) 5 PM (c) 7 PM (d) 6 PM
28. 28.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
29. 29.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
30. 30.🧩 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
31. 31.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
32. 32.🧩 Diya is 7 years old. Arjun is older than Diya. How old is Arjun? (a) 9 (b) 8 (c) 12 (d) not enough info
33. 33.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) 6 PM (b) 7 PM (c) 5 PM (d) not enough info
34. 34.🧩 Aarav bought 2 balls for ₹90 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹45 (c) ₹90 (d) ₹50
35. 35.🧩 A box has 8 rows of guavas, with 8 in each row. How many guavas are in the box? (a) 16 (b) 72 (c) not enough info (d) 64
36. 36.🧩 Aarav bought 4 markers and a bag for ₹110 in all. Each marker cost the same. What did one marker cost? (a) ₹27 (b) ₹110 (c) ₹106 (d) not enough info
37. 37.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
38. 38.🧩 A box has 5 rows of mangoes, with 7 in each row. How many mangoes are in the box? (a) 42 (b) not enough info (c) 12 (d) 35
39. 39.🧩 The film starts at 6 PM and lasts 3 hours. When does it end? (a) 10 PM (b) 9 PM (c) not enough info (d) 6 PM
40. 40.🧩 Arjun is 11 years old. Meera is 6 years older than Arjun. How old is Meera? (a) 18 (b) not enough info (c) 6 (d) 17

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