Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 891 · 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.🧩 A box has 8 rows of guavas, with 6 in each row. How many guavas are in the box? (a) 14 (b) 54 (c) not enough info (d) 48
2. 2.🧩 Aarav bought 2 balls for ₹30 in all. Each ball cost the same. What did one ball cost? (a) ₹20 (b) not enough info (c) ₹30 (d) ₹15
3. 3.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
4. 4.🔬 Why do scientists repeat an experiment? (a) to waste time (b) to change answers (c) to be sure of results (d) for fun only
5. 5.🧩 Arjun is 11 years old. Ishaan is older than Arjun. How old is Ishaan? (a) 13 (b) not enough info (c) 16 (d) 12
6. 6.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
7. 7.🧩 A box of mangoes has 6 in each row. How many mangoes are in the box? (a) 60 (b) 6 (c) not enough info (d) 12
8. 8.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) False (b) True
9. 9.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking one friend (c) asking your pet (d) asking the whole class
10. 10.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True
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: “My friend didn’t like the book, so the book is bad for everyone.” does not give enough evidence. (a) True (b) False
13. 13.🧩 Ananya is 7 years old. Ishaan is 3 years older than Ananya. How old is Ishaan? (a) not enough info (b) 11 (c) 10 (d) 3
14. 14.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
15. 15.🧩 Saanvi bought 2 notebooks for ₹70 in all. Each notebook cost the same. What did one notebook cost? (a) ₹35 (b) not enough info (c) ₹40 (d) ₹70
16. 16.🧩 A box has 6 rows of mangoes, with 8 in each row. How many mangoes are in the box? (a) 56 (b) 48 (c) not enough info (d) 14
17. 17.🧩 Meera bought 6 mangoes for ₹150 in all. Each mango cost the same. What did one mango cost? (a) ₹30 (b) ₹25 (c) not enough info (d) ₹150
18. 18.🧩 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
19. 19.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) 6 PM (b) not enough info (c) 7 PM (d) 8 PM
20. 20.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
21. 21.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
22. 22.🧩 Aarav is 11 years old. Nisha is older than Aarav. How old is Nisha? (a) 12 (b) not enough info (c) 13 (d) 16
23. 23.🧩 A box has 5 rows of apples, with 7 in each row. How many apples are in the box? (a) not enough info (b) 42 (c) 35 (d) 12
24. 24.🧩 Kabir bought 3 kites and a lunch box for ₹170 in all. Each kite cost the same. What did one kite cost? (a) ₹170 (b) not enough info (c) ₹56 (d) ₹167
25. 25.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
26. 26.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) not enough info (b) 5 PM (c) 7 PM (d) 6 PM
27. 27.🧩 Kabir bought 3 markers and a lunch box for ₹75 in all. Each marker cost the same. What did one marker cost? (a) ₹72 (b) ₹25 (c) ₹75 (d) not enough info
28. 28.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
29. 29.🧩 Before solving a word problem, first check… (a) your handwriting (b) what facts are given (c) the colour of ink (d) the page number
30. 30.🧩 Kabir bought 4 kites and a bag for ₹190 in all. Each kite cost the same. What did one kite cost? (a) ₹190 (b) not enough info (c) ₹186 (d) ₹47
31. 31.🧩 Ananya is 6 years old. Kabir is older than Ananya. How old is Kabir? (a) 8 (b) 7 (c) not enough info (d) 11
32. 32.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
33. 33.🧩 Nisha bought 3 balls for ₹135 in all. Each ball cost the same. What did one ball cost? (a) ₹45 (b) ₹50 (c) ₹135 (d) not enough info
34. 34.🧩 A box of guavas has 8 in each row. How many guavas are in the box? (a) 80 (b) not enough info (c) 8 (d) 16
35. 35.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
36. 36.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) that one dog barked (c) dogs hate you (d) never see dogs
37. 37.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
38. 38.📝 What does “evidence” mean? (a) a guess (b) a rumour (c) a loud opinion (d) facts that support it
39. 39.🧩 Meera is 7 years old. Diya is 9 years older than Meera. How old is Diya? (a) 16 (b) 9 (c) 17 (d) not enough info
40. 40.🥭 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

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