Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 374 · 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.🧩 Arjun bought 5 kites for ₹150 in all. Each kite cost the same. What did one kite cost? (a) ₹35 (b) ₹30 (c) ₹150 (d) not enough info
2. 2.📝 What does “evidence” mean? (a) facts that support it (b) a rumour (c) a loud opinion (d) a guess
3. 3.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
4. 4.🧩 Saanvi bought 2 mangoes and a cap for ₹120 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹118 (c) ₹120 (d) ₹60
5. 5.🧩 Nisha is 7 years old. Meera is 2 years older than Nisha. How old is Meera? (a) not enough info (b) 2 (c) 9 (d) 10
6. 6.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
7. 7.🧩 A box of apples has 8 in each row. How many apples are in the box? (a) 8 (b) 80 (c) not enough info (d) 16
8. 8.🧩 A box of apples has 9 in each row. How many apples are in the box? (a) 9 (b) 18 (c) 90 (d) not enough info
9. 9.🧩 Nisha bought 3 markers for ₹150 in all. Each marker cost the same. What did one marker cost? (a) ₹150 (b) ₹50 (c) not enough info (d) ₹55
10. 10.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
11. 11.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
12. 12.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) False (b) True
13. 13.🧩 A box of guavas has 8 in each row. How many guavas are in the box? (a) 8 (b) 80 (c) 16 (d) not enough info
14. 14.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
15. 15.🧩 Ananya is 8 years old. Saanvi is older than Ananya. How old is Saanvi? (a) 9 (b) 10 (c) not enough info (d) 13
16. 16.🧩 Nisha is 9 years old. Diya is older than Nisha. How old is Diya? (a) 14 (b) not enough info (c) 11 (d) 10
17. 17.🧩 The film starts at 4 PM and lasts 3 hours. When does it end? (a) 4 PM (b) 8 PM (c) not enough info (d) 7 PM
18. 18.🧩 Saanvi bought 4 balls and a water bottle for ₹170 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹166 (c) ₹170 (d) ₹42
19. 19.🥭 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
20. 20.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
21. 21.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
22. 22.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) True (b) False
23. 23.🧩 Ananya bought 6 markers for ₹270 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹45 (c) ₹270 (d) ₹50
24. 24.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) enough evidence (b) not enough evidence
25. 25.🧩 Before solving a word problem, first check… (a) the page number (b) what facts are given (c) your handwriting (d) the colour of ink
26. 26.🧩 Meera bought 4 kites and a bag for ₹210 in all. Each kite cost the same. What did one kite cost? (a) ₹206 (b) ₹210 (c) not enough info (d) ₹52
27. 27.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
28. 28.🧩 A box has 8 rows of oranges, with 6 in each row. How many oranges are in the box? (a) 48 (b) not enough info (c) 14 (d) 54
29. 29.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) 5 PM (b) 8 PM (c) not enough info (d) 7 PM
30. 30.🔬 Why do scientists repeat an experiment? (a) to change answers (b) to be sure of results (c) to waste time (d) for fun only
31. 31.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
32. 32.🧩 A box of mangoes has 4 in each row. How many mangoes are in the box? (a) 4 (b) 40 (c) not enough info (d) 8
33. 33.🧩 The film starts at 6 PM and lasts 2 hours. When does it end? (a) 9 PM (b) 6 PM (c) 8 PM (d) not enough info
34. 34.🧩 The film starts at 3 PM and lasts 1 hour. When does it end? (a) not enough info (b) 4 PM (c) 5 PM (d) 3 PM
35. 35.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) 2 PM (b) not enough info (c) 4 PM (d) 3 PM
36. 36.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
37. 37.🧩 A box of eggs has 4 in each row. How many eggs are in the box? (a) not enough info (b) 40 (c) 8 (d) 4
38. 38.🧩 Diya is 7 years old. Meera is 7 years older than Diya. How old is Meera? (a) 7 (b) 14 (c) 15 (d) not enough info
39. 39.🧩 Aarav is 10 years old. Tara is 2 years older than Aarav. How old is Tara? (a) not enough info (b) 13 (c) 2 (d) 12
40. 40.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True

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