Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 470 · 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 6 balls for ₹270 in all. Each ball cost the same. What did one ball cost? (a) ₹50 (b) ₹45 (c) not enough info (d) ₹270
2. 2.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no, check more (b) yes, it is certain (c) yes, mangoes match (d) no mango is sweet
3. 3.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
4. 4.🐕 One dog barked at you. What is the fair conclusion? (a) that one dog barked (b) dogs hate you (c) all dogs are mean (d) never see dogs
5. 5.🧩 Arjun bought 2 mangoes for ₹70 in all. Each mango cost the same. What did one mango cost? (a) ₹70 (b) ₹40 (c) ₹35 (d) not enough info
6. 6.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) False (b) True
7. 7.True or false: “One student said the canteen food was cold, so it is always cold.” does not give enough evidence. (a) True (b) False
8. 8.🧩 A box has 8 rows of laddoos, with 8 in each row. How many laddoos are in the box? (a) 16 (b) 64 (c) not enough info (d) 72
9. 9.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
10. 10.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
11. 11.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) not enough info (b) 6 PM (c) 4 PM (d) 5 PM
12. 12.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) not enough evidence (b) enough evidence
13. 13.🧩 Meera bought 3 balls for ₹60 in all. Each ball cost the same. What did one ball cost? (a) ₹60 (b) ₹25 (c) not enough info (d) ₹20
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.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
16. 16.📝 What does “evidence” mean? (a) facts that support it (b) a loud opinion (c) a guess (d) a rumour
17. 17.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
18. 18.🧩 Saanvi bought 3 kites and a cap for ₹80 in all. Each kite cost the same. What did one kite cost? (a) ₹77 (b) ₹26 (c) not enough info (d) ₹80
19. 19.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
20. 20.🧩 Diya is 9 years old. Saanvi is 8 years older than Diya. How old is Saanvi? (a) 8 (b) not enough info (c) 17 (d) 18
21. 21.🧩 A box of eggs has 6 in each row. How many eggs are in the box? (a) 6 (b) 12 (c) not enough info (d) 60
22. 22.📊 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
23. 23.🧩 Ishaan is 9 years old. Vihaan is 4 years older than Ishaan. How old is Vihaan? (a) 13 (b) 4 (c) not enough info (d) 14
24. 24.🧩 The film starts at 3 PM and lasts 2 hours. When does it end? (a) not enough info (b) 6 PM (c) 3 PM (d) 5 PM
25. 25.🧩 A box has 3 rows of apples, with 5 in each row. How many apples are in the box? (a) not enough info (b) 20 (c) 8 (d) 15
26. 26.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) 8 PM (b) 7 PM (c) 6 PM (d) not enough info
27. 27.🧩 A box has 5 rows of eggs, with 8 in each row. How many eggs are in the box? (a) 13 (b) 48 (c) not enough info (d) 40
28. 28.🧩 Before solving a word problem, first check… (a) the page number (b) the colour of ink (c) your handwriting (d) what facts are given
29. 29.🧩 A box has 5 rows of guavas, with 6 in each row. How many guavas are in the box? (a) 36 (b) not enough info (c) 30 (d) 11
30. 30.🧩 Arjun is 11 years old. Kabir is older than Arjun. How old is Kabir? (a) not enough info (b) 12 (c) 16 (d) 13
31. 31.🧩 Ishaan bought 2 pens for ₹40 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹25 (c) ₹40 (d) ₹20
32. 32.🧩 Meera bought 5 balls for ₹225 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹45 (c) ₹50 (d) ₹225
33. 33.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
34. 34.🧩 A box of apples has 9 in each row. How many apples are in the box? (a) 18 (b) not enough info (c) 9 (d) 90
35. 35.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 7 PM (b) 5 PM (c) 6 PM (d) not enough info
36. 36.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
37. 37.🧩 Saanvi is 12 years old. Ananya is older than Saanvi. How old is Ananya? (a) 13 (b) 14 (c) 17 (d) not enough info
38. 38.🧩 The film starts at 4 PM and lasts 2 hours. When does it end? (a) 6 PM (b) 7 PM (c) not enough info (d) 4 PM
39. 39.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
40. 40.🧩 Kabir bought 4 pens and a water bottle for ₹200 in all. Each pen cost the same. What did one pen cost? (a) ₹196 (b) not enough info (c) ₹50 (d) ₹200

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