Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 961 · 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.🧩 Ishaan is 7 years old. Aarav is 2 years older than Ishaan. How old is Aarav? (a) not enough info (b) 9 (c) 10 (d) 2
2. 2.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
3. 3.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) asking the whole class (c) asking your pet (d) guessing
4. 4.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
5. 5.🧩 A box of oranges has 7 in each row. How many oranges are in the box? (a) 14 (b) 70 (c) 7 (d) not enough info
6. 6.🧩 Nisha is 12 years old. Rohan is older than Nisha. How old is Rohan? (a) 13 (b) 14 (c) 17 (d) not enough info
7. 7.🧩 Meera bought 5 markers and a lunch box for ₹220 in all. Each marker cost the same. What did one marker cost? (a) ₹44 (b) not enough info (c) ₹220 (d) ₹215
8. 8.📝 What does “evidence” mean? (a) facts that support it (b) a guess (c) a loud opinion (d) a rumour
9. 9.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
10. 10.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
11. 11.🧩 Diya bought 4 kites and a water bottle for ₹280 in all. Each kite cost the same. What did one kite cost? (a) ₹70 (b) ₹276 (c) ₹280 (d) not enough info
12. 12.🧩 A box has 6 rows of apples, with 5 in each row. How many apples are in the box? (a) 11 (b) not enough info (c) 35 (d) 30
13. 13.🧩 A box has 5 rows of guavas, with 9 in each row. How many guavas are in the box? (a) 14 (b) 54 (c) not enough info (d) 45
14. 14.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
15. 15.🐕 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
16. 16.🧩 Diya bought 2 notebooks and a lunch box for ₹170 in all. Each notebook cost the same. What did one notebook cost? (a) ₹168 (b) not enough info (c) ₹85 (d) ₹170
17. 17.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
18. 18.🧩 A box of apples has 7 in each row. How many apples are in the box? (a) not enough info (b) 14 (c) 70 (d) 7
19. 19.🧩 Nisha bought 2 notebooks for ₹70 in all. Each notebook cost the same. What did one notebook cost? (a) ₹40 (b) not enough info (c) ₹35 (d) ₹70
20. 20.🧩 A box of mangoes has 6 in each row. How many mangoes are in the box? (a) 60 (b) 12 (c) 6 (d) not enough info
21. 21.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 8 PM (b) 6 PM (c) 7 PM (d) not enough info
22. 22.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) enough evidence (b) not enough evidence
23. 23.🧩 Arjun is 7 years old. Ishaan is older than Arjun. How old is Ishaan? (a) 12 (b) 9 (c) 8 (d) not enough info
24. 24.🧩 The film starts at 6 PM and lasts 2 hours. When does it end? (a) 8 PM (b) 6 PM (c) 9 PM (d) not enough info
25. 25.🧩 A box of apples has 4 in each row. How many apples are in the box? (a) 4 (b) 40 (c) 8 (d) not enough info
26. 26.🧩 Kabir bought 3 pens for ₹60 in all. Each pen cost the same. What did one pen cost? (a) ₹25 (b) ₹60 (c) not enough info (d) ₹20
27. 27.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
28. 28.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
29. 29.🧩 Arjun is 8 years old. Ananya is 8 years older than Arjun. How old is Ananya? (a) 17 (b) 16 (c) 8 (d) not enough info
30. 30.True or false: “One student said the canteen food was cold, so it is always cold.” does not give enough evidence. (a) False (b) True
31. 31.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
32. 32.🧩 Aarav bought 3 pens and a cap for ₹200 in all. Each pen cost the same. What did one pen cost? (a) ₹66 (b) ₹200 (c) ₹197 (d) not enough info
33. 33.🧩 Before solving a word problem, first check… (a) the colour of ink (b) what facts are given (c) your handwriting (d) the page number
34. 34.🧩 A box has 8 rows of guavas, with 7 in each row. How many guavas are in the box? (a) 56 (b) 63 (c) not enough info (d) 15
35. 35.🧩 Kabir bought 2 mangoes and a cap for ₹100 in all. Each mango cost the same. What did one mango cost? (a) ₹98 (b) ₹100 (c) not enough info (d) ₹50
36. 36.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
37. 37.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
38. 38.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True
39. 39.🧩 A box has 8 rows of laddoos, with 4 in each row. How many laddoos are in the box? (a) 36 (b) not enough info (c) 12 (d) 32
40. 40.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False

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