Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 404 · 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) yes, mangoes match (b) no mango is sweet (c) yes, it is certain (d) no, check more
2. 2.📊 Which gives the best evidence about the class’s favourite game? (a) asking the whole class (b) guessing (c) asking your pet (d) asking one friend
3. 3.🧩 Meera bought 5 notebooks for ₹275 in all. Each notebook cost the same. What did one notebook cost? (a) ₹60 (b) ₹275 (c) not enough info (d) ₹55
4. 4.🧩 Ananya bought 4 kites for ₹60 in all. Each kite cost the same. What did one kite cost? (a) ₹20 (b) not enough info (c) ₹15 (d) ₹60
5. 5.🧩 Kabir bought 4 markers and a lunch box for ₹230 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹230 (c) ₹226 (d) ₹57
6. 6.🧩 Vihaan is 9 years old. Arjun is 4 years older than Vihaan. How old is Arjun? (a) 4 (b) not enough info (c) 14 (d) 13
7. 7.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
8. 8.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
9. 9.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True
10. 10.🔬 Why do scientists repeat an experiment? (a) to be sure of results (b) for fun only (c) to waste time (d) to change answers
11. 11.🧩 Ishaan bought 5 balls for ₹50 in all. Each ball cost the same. What did one ball cost? (a) ₹50 (b) ₹15 (c) not enough info (d) ₹10
12. 12.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
13. 13.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
14. 14.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 8 PM (b) 7 PM (c) not enough info (d) 9 PM
15. 15.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) that one dog barked (c) all dogs are mean (d) never see dogs
16. 16.🧩 Aarav is 9 years old. Diya is 3 years older than Aarav. How old is Diya? (a) 12 (b) 3 (c) not enough info (d) 13
17. 17.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) True (b) False
18. 18.🧩 Rohan bought 2 notebooks and a lunch box for ₹120 in all. Each notebook cost the same. What did one notebook cost? (a) ₹120 (b) ₹60 (c) ₹118 (d) not enough info
19. 19.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) 7 PM (b) 6 PM (c) not enough info (d) 8 PM
20. 20.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
21. 21.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 5 PM (b) 6 PM (c) not enough info (d) 4 PM
22. 22.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) 8 PM (b) not enough info (c) 5 PM (d) 7 PM
23. 23.🧩 Before solving a word problem, first check… (a) your handwriting (b) the page number (c) the colour of ink (d) what facts are given
24. 24.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
25. 25.🧩 A box has 8 rows of oranges, with 8 in each row. How many oranges are in the box? (a) 64 (b) 16 (c) not enough info (d) 72
26. 26.🧩 Nisha is 10 years old. Diya is 2 years older than Nisha. How old is Diya? (a) 2 (b) 13 (c) not enough info (d) 12
27. 27.🧩 The film starts at 3 PM and lasts 3 hours. When does it end? (a) 7 PM (b) 3 PM (c) 6 PM (d) not enough info
28. 28.🧩 Ananya is 12 years old. Nisha is 9 years older than Ananya. How old is Nisha? (a) not enough info (b) 22 (c) 9 (d) 21
29. 29.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
30. 30.🧩 A box of apples has 4 in each row. How many apples are in the box? (a) 8 (b) not enough info (c) 40 (d) 4
31. 31.🧩 The film starts at 3 PM and lasts 1 hour. When does it end? (a) 4 PM (b) 5 PM (c) 3 PM (d) not enough info
32. 32.🧩 A box has 7 rows of oranges, with 8 in each row. How many oranges are in the box? (a) not enough info (b) 64 (c) 15 (d) 56
33. 33.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 3 PM (b) not enough info (c) 5 PM (d) 4 PM
34. 34.🧩 Vihaan bought 3 pens for ₹150 in all. Each pen cost the same. What did one pen cost? (a) ₹150 (b) not enough info (c) ₹50 (d) ₹55
35. 35.🧩 A box of oranges has 7 in each row. How many oranges are in the box? (a) 14 (b) not enough info (c) 70 (d) 7
36. 36.🧩 Kabir is 6 years old. Diya is 8 years older than Kabir. How old is Diya? (a) not enough info (b) 8 (c) 15 (d) 14
37. 37.🧩 A box of mangoes has 6 in each row. How many mangoes are in the box? (a) 6 (b) 12 (c) 60 (d) not enough info
38. 38.🧩 Saanvi bought 2 markers and a water bottle for ₹50 in all. Each marker cost the same. What did one marker cost? (a) ₹50 (b) ₹25 (c) not enough info (d) ₹48
39. 39.🧩 Rohan bought 6 pens for ₹300 in all. Each pen cost the same. What did one pen cost? (a) ₹55 (b) not enough info (c) ₹300 (d) ₹50
40. 40.🧩 Nisha is 7 years old. Diya is older than Nisha. How old is Diya? (a) 12 (b) 8 (c) not enough info (d) 9

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