Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 854 · 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.🧩 Aarav bought 2 mangoes for ₹80 in all. Each mango cost the same. What did one mango cost? (a) ₹40 (b) ₹80 (c) not enough info (d) ₹45
2. 2.🧩 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
3. 3.📝 What does “evidence” mean? (a) a loud opinion (b) a guess (c) facts that support it (d) a rumour
4. 4.🧩 A box of eggs has 8 in each row. How many eggs are in the box? (a) 8 (b) 16 (c) not enough info (d) 80
5. 5.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
6. 6.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) yes, it is certain (b) yes, mangoes match (c) no mango is sweet (d) no, check more
7. 7.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
8. 8.🧩 Meera bought 4 notebooks for ₹100 in all. Each notebook cost the same. What did one notebook cost? (a) ₹100 (b) not enough info (c) ₹25 (d) ₹30
9. 9.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
10. 10.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
11. 11.🧩 Arjun is 12 years old. Nisha is 3 years older than Arjun. How old is Nisha? (a) not enough info (b) 3 (c) 15 (d) 16
12. 12.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
13. 13.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
14. 14.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
15. 15.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True
16. 16.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
17. 17.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
18. 18.🧩 Kabir bought 3 mangoes and a lunch box for ₹215 in all. Each mango cost the same. What did one mango cost? (a) ₹212 (b) ₹215 (c) ₹71 (d) not enough info
19. 19.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
20. 20.🧩 A box of laddoos has 4 in each row. How many laddoos are in the box? (a) not enough info (b) 4 (c) 40 (d) 8
21. 21.🧩 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
22. 22.🔬 Why do scientists repeat an experiment? (a) to be sure of results (b) to waste time (c) to change answers (d) for fun only
23. 23.🧩 Arjun is 11 years old. Diya is older than Arjun. How old is Diya? (a) 16 (b) 12 (c) 13 (d) not enough info
24. 24.🧩 Aarav bought 2 notebooks for ₹30 in all. Each notebook cost the same. What did one notebook cost? (a) ₹30 (b) ₹20 (c) ₹15 (d) not enough info
25. 25.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
26. 26.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
27. 27.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
28. 28.🧩 Nisha bought 4 notebooks and a lunch box for ₹140 in all. Each notebook cost the same. What did one notebook cost? (a) ₹136 (b) ₹140 (c) ₹35 (d) not enough info
29. 29.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
30. 30.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) not enough info (b) 9 PM (c) 8 PM (d) 7 PM
31. 31.🧩 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
32. 32.🧩 Aarav is 6 years old. Ishaan is older than Aarav. How old is Ishaan? (a) 11 (b) 7 (c) not enough info (d) 8
33. 33.🧩 Meera bought 4 kites for ₹180 in all. Each kite cost the same. What did one kite cost? (a) ₹180 (b) not enough info (c) ₹45 (d) ₹50
34. 34.🧩 Before solving a word problem, first check… (a) what facts are given (b) the colour of ink (c) your handwriting (d) the page number
35. 35.🧩 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
36. 36.🧩 A box has 6 rows of laddoos, with 5 in each row. How many laddoos are in the box? (a) 30 (b) 11 (c) 35 (d) not enough info
37. 37.🧩 Vihaan bought 4 markers for ₹220 in all. Each marker cost the same. What did one marker cost? (a) ₹60 (b) not enough info (c) ₹55 (d) ₹220
38. 38.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
39. 39.🧩 Tara bought 6 kites for ₹90 in all. Each kite cost the same. What did one kite cost? (a) ₹20 (b) ₹15 (c) not enough info (d) ₹90
40. 40.🧩 A box has 4 rows of eggs, with 4 in each row. How many eggs are in the box? (a) 16 (b) 8 (c) not enough info (d) 20

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