Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 506 · 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.🧩 Kabir bought 3 balls and a lunch box for ₹125 in all. Each ball cost the same. What did one ball cost? (a) ₹125 (b) ₹41 (c) ₹122 (d) not enough info
2. 2.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
3. 3.📝 What does “evidence” mean? (a) a rumour (b) a loud opinion (c) facts that support it (d) a guess
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.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
6. 6.🧩 Meera bought 4 balls and a bag for ₹210 in all. Each ball cost the same. What did one ball cost? (a) ₹206 (b) ₹52 (c) ₹210 (d) not enough info
7. 7.🧩 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
8. 8.🧩 Kabir is 6 years old. Meera is 3 years older than Kabir. How old is Meera? (a) 10 (b) 3 (c) 9 (d) not enough info
9. 9.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) False (b) True
10. 10.🧩 Before solving a word problem, first check… (a) the colour of ink (b) what facts are given (c) the page number (d) your handwriting
11. 11.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
12. 12.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
13. 13.🧩 A box of eggs has 9 in each row. How many eggs are in the box? (a) not enough info (b) 90 (c) 18 (d) 9
14. 14.📊 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
15. 15.🧩 Meera is 9 years old. Aarav is 4 years older than Meera. How old is Aarav? (a) not enough info (b) 14 (c) 4 (d) 13
16. 16.🧩 The film starts at 2 PM and lasts 3 hours. When does it end? (a) 2 PM (b) 5 PM (c) not enough info (d) 6 PM
17. 17.True or false: “One mango in the box was sour, so all the mangoes are sour.” does not give enough evidence. (a) False (b) True
18. 18.🧩 A box has 6 rows of apples, with 6 in each row. How many apples are in the box? (a) 12 (b) not enough info (c) 36 (d) 42
19. 19.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
20. 20.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) never see dogs (c) dogs hate you (d) that one dog barked
21. 21.🧩 Rohan is 8 years old. Kabir is 2 years older than Rohan. How old is Kabir? (a) 10 (b) not enough info (c) 11 (d) 2
22. 22.🧩 A box has 8 rows of apples, with 9 in each row. How many apples are in the box? (a) 72 (b) not enough info (c) 81 (d) 17
23. 23.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
24. 24.🧩 Meera bought 5 kites and a water bottle for ₹250 in all. Each kite cost the same. What did one kite cost? (a) ₹245 (b) ₹50 (c) ₹250 (d) not enough info
25. 25.🧩 A box of eggs has 5 in each row. How many eggs are in the box? (a) 5 (b) 50 (c) 10 (d) not enough info
26. 26.🥭 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) yes, it is certain (c) no, check more (d) no mango is sweet
27. 27.🧩 Vihaan bought 3 notebooks for ₹180 in all. Each notebook cost the same. What did one notebook cost? (a) ₹65 (b) ₹180 (c) ₹60 (d) not enough info
28. 28.🧩 A box of guavas has 9 in each row. How many guavas are in the box? (a) 9 (b) 18 (c) not enough info (d) 90
29. 29.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
30. 30.🧩 Kabir is 11 years old. Meera is older than Kabir. How old is Meera? (a) not enough info (b) 13 (c) 16 (d) 12
31. 31.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 6 PM (b) 5 PM (c) not enough info (d) 7 PM
32. 32.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True
33. 33.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
34. 34.🧩 A box has 3 rows of apples, with 6 in each row. How many apples are in the box? (a) not enough info (b) 9 (c) 18 (d) 24
35. 35.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
36. 36.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
37. 37.🧩 A box of guavas has 7 in each row. How many guavas are in the box? (a) 14 (b) 7 (c) not enough info (d) 70
38. 38.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) not enough info (b) 8 PM (c) 7 PM (d) 5 PM
39. 39.🧩 Arjun is 10 years old. Rohan is 6 years older than Arjun. How old is Rohan? (a) 17 (b) 6 (c) not enough info (d) 16
40. 40.🧩 Ananya bought 3 markers and a bag for ₹230 in all. Each marker cost the same. What did one marker cost? (a) ₹230 (b) ₹76 (c) ₹227 (d) not enough info

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