Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 295 · 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.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) True (b) False
2. 2.🧩 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
3. 3.🧩 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
4. 4.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
5. 5.🧩 Kabir is 10 years old. Ananya is 3 years older than Kabir. How old is Ananya? (a) 3 (b) 14 (c) 13 (d) not enough info
6. 6.🧩 Tara is 8 years old. Aarav is older than Tara. How old is Aarav? (a) 9 (b) not enough info (c) 13 (d) 10
7. 7.🧩 Aarav bought 4 balls and a lunch box for ₹130 in all. Each ball cost the same. What did one ball cost? (a) ₹126 (b) ₹130 (c) not enough info (d) ₹32
8. 8.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
9. 9.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
10. 10.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
11. 11.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) True (b) False
12. 12.🧩 The film starts at 3 PM and lasts 3 hours. When does it end? (a) 3 PM (b) 7 PM (c) not enough info (d) 6 PM
13. 13.🧩 The film starts at 4 PM and lasts 3 hours. When does it end? (a) 4 PM (b) 7 PM (c) not enough info (d) 8 PM
14. 14.🧩 Nisha bought 2 kites and a cap for ₹190 in all. Each kite cost the same. What did one kite cost? (a) ₹190 (b) ₹188 (c) not enough info (d) ₹95
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.🧩 Before solving a word problem, first check… (a) your handwriting (b) the colour of ink (c) what facts are given (d) the page number
17. 17.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
18. 18.🧩 Aarav bought 2 mangoes and a lunch box for ₹160 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹160 (c) ₹80 (d) ₹158
19. 19.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
20. 20.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
21. 21.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to be sure of results (c) to change answers (d) to waste time
22. 22.🧩 A box of apples has 5 in each row. How many apples are in the box? (a) not enough info (b) 10 (c) 50 (d) 5
23. 23.🧩 Diya bought 2 markers and a cap for ₹90 in all. Each marker cost the same. What did one marker cost? (a) ₹90 (b) ₹88 (c) not enough info (d) ₹45
24. 24.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
25. 25.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) 7 PM (b) 5 PM (c) not enough info (d) 6 PM
26. 26.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
27. 27.🧩 The film starts at 3 PM and lasts 1 hour. When does it end? (a) not enough info (b) 5 PM (c) 4 PM (d) 3 PM
28. 28.🧩 Kabir bought 5 notebooks for ₹250 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹250 (c) ₹50 (d) ₹55
29. 29.🧩 Diya is 10 years old. Meera is 8 years older than Diya. How old is Meera? (a) 18 (b) 8 (c) 19 (d) not enough info
30. 30.🧩 Meera bought 2 markers for ₹40 in all. Each marker cost the same. What did one marker cost? (a) ₹40 (b) not enough info (c) ₹25 (d) ₹20
31. 31.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
32. 32.🧩 Ishaan is 8 years old. Arjun is 4 years older than Ishaan. How old is Arjun? (a) 13 (b) not enough info (c) 4 (d) 12
33. 33.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
34. 34.🧩 Vihaan is 6 years old. Rohan is older than Vihaan. How old is Rohan? (a) not enough info (b) 7 (c) 8 (d) 11
35. 35.🧩 Aarav bought 3 kites for ₹135 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹50 (c) ₹135 (d) ₹45
36. 36.🧩 A box has 7 rows of apples, with 4 in each row. How many apples are in the box? (a) not enough info (b) 11 (c) 28 (d) 32
37. 37.📝 What does “evidence” mean? (a) facts that support it (b) a rumour (c) a loud opinion (d) a guess
38. 38.🧩 Arjun bought 5 markers and a water bottle for ₹220 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹220 (c) ₹44 (d) ₹215
39. 39.🥭 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, check more (d) no mango is sweet
40. 40.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

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