Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 184 · 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.🥭 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) no, check more (c) yes, it is certain (d) yes, mangoes match
2. 2.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) not enough info (b) 6 PM (c) 5 PM (d) 7 PM
3. 3.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
4. 4.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
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.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True
7. 7.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) all dogs are mean (c) never see dogs (d) that one dog barked
8. 8.🧩 Meera is 6 years old. Vihaan is 6 years older than Meera. How old is Vihaan? (a) 13 (b) 12 (c) not enough info (d) 6
9. 9.🧩 Meera is 10 years old. Rohan is older than Meera. How old is Rohan? (a) not enough info (b) 11 (c) 15 (d) 12
10. 10.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
11. 11.🧩 A box has 3 rows of mangoes, with 5 in each row. How many mangoes are in the box? (a) 8 (b) not enough info (c) 20 (d) 15
12. 12.🧩 Ishaan bought 5 mangoes and a cap for ₹120 in all. Each mango cost the same. What did one mango cost? (a) ₹115 (b) not enough info (c) ₹24 (d) ₹120
13. 13.🧩 A box of guavas has 7 in each row. How many guavas are in the box? (a) 7 (b) 70 (c) 14 (d) not enough info
14. 14.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
15. 15.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to change answers (c) to waste time (d) to be sure of results
16. 16.🧩 A box of mangoes has 6 in each row. How many mangoes are in the box? (a) 12 (b) 60 (c) 6 (d) not enough info
17. 17.🧩 Arjun bought 2 markers and a cap for ₹90 in all. Each marker cost the same. What did one marker cost? (a) ₹45 (b) ₹88 (c) ₹90 (d) not enough info
18. 18.🧩 Rohan bought 4 mangoes and a bag for ₹150 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹146 (c) ₹37 (d) ₹150
19. 19.🧩 Saanvi is 7 years old. Diya is 6 years older than Saanvi. How old is Diya? (a) not enough info (b) 14 (c) 13 (d) 6
20. 20.🧩 Kabir bought 6 markers and a bag for ₹360 in all. Each marker cost the same. What did one marker cost? (a) ₹60 (b) ₹360 (c) not enough info (d) ₹354
21. 21.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 7 PM (b) 6 PM (c) 8 PM (d) not enough info
22. 22.🧩 A box of mangoes has 9 in each row. How many mangoes are in the box? (a) 90 (b) 9 (c) 18 (d) not enough info
23. 23.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
24. 24.🧩 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
25. 25.🧩 Arjun is 12 years old. Rohan is older than Arjun. How old is Rohan? (a) 17 (b) not enough info (c) 14 (d) 13
26. 26.🧩 Before solving a word problem, first check… (a) what facts are given (b) your handwriting (c) the page number (d) the colour of ink
27. 27.🧩 Vihaan is 9 years old. Kabir is 8 years older than Vihaan. How old is Kabir? (a) 18 (b) not enough info (c) 8 (d) 17
28. 28.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
29. 29.🧩 Aarav is 10 years old. Diya is older than Aarav. How old is Diya? (a) 12 (b) 15 (c) not enough info (d) 11
30. 30.🧩 A box of oranges has 5 in each row. How many oranges are in the box? (a) 50 (b) 5 (c) 10 (d) not enough info
31. 31.🧩 Rohan is 9 years old. Tara is 2 years older than Rohan. How old is Tara? (a) not enough info (b) 11 (c) 12 (d) 2
32. 32.🧩 Meera bought 6 balls for ₹270 in all. Each ball cost the same. What did one ball cost? (a) ₹270 (b) ₹50 (c) ₹45 (d) not enough info
33. 33.🧩 Saanvi is 6 years old. Ishaan is 4 years older than Saanvi. How old is Ishaan? (a) 10 (b) 11 (c) not enough info (d) 4
34. 34.🧩 A box of oranges has 4 in each row. How many oranges are in the box? (a) 40 (b) 4 (c) 8 (d) not enough info
35. 35.🧩 A box of eggs has 7 in each row. How many eggs are in the box? (a) not enough info (b) 7 (c) 70 (d) 14
36. 36.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True
37. 37.🧩 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
38. 38.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
39. 39.🧩 Rohan is 6 years old. Aarav is 3 years older than Rohan. How old is Aarav? (a) 9 (b) 10 (c) 3 (d) not enough info
40. 40.🧩 Diya is 11 years old. Meera is older than Diya. How old is Meera? (a) 12 (b) 13 (c) not enough info (d) 16

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