Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 835 · 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.🧩 Ishaan is 8 years old. Kabir is 3 years older than Ishaan. How old is Kabir? (a) 11 (b) not enough info (c) 3 (d) 12
2. 2.🧩 Aarav is 6 years old. Saanvi is older than Aarav. How old is Saanvi? (a) 8 (b) 11 (c) not enough info (d) 7
3. 3.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) False (b) True
4. 4.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) not enough info (b) 5 PM (c) 6 PM (d) 4 PM
5. 5.🧩 Kabir is 7 years old. Vihaan is 8 years older than Kabir. How old is Vihaan? (a) 16 (b) not enough info (c) 15 (d) 8
6. 6.🧩 Aarav bought 3 markers for ₹75 in all. Each marker cost the same. What did one marker cost? (a) ₹30 (b) ₹25 (c) not enough info (d) ₹75
7. 7.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
8. 8.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
9. 9.🧩 A box of laddoos has 7 in each row. How many laddoos are in the box? (a) 14 (b) not enough info (c) 7 (d) 70
10. 10.🧩 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
11. 11.🧩 Kabir is 9 years old. Ananya is 4 years older than Kabir. How old is Ananya? (a) not enough info (b) 4 (c) 13 (d) 14
12. 12.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 7 PM (b) not enough info (c) 9 PM (d) 8 PM
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.🧩 Ananya bought 3 balls and a lunch box for ₹200 in all. Each ball cost the same. What did one ball cost? (a) ₹66 (b) ₹197 (c) not enough info (d) ₹200
15. 15.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
16. 16.🥭 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) no mango is sweet (d) yes, mangoes match
17. 17.🧩 Ananya bought 2 notebooks for ₹120 in all. Each notebook cost the same. What did one notebook cost? (a) ₹65 (b) ₹60 (c) ₹120 (d) not enough info
18. 18.True or false: “My friend didn’t like the book, so the book is bad for everyone.” does not give enough evidence. (a) False (b) True
19. 19.🧩 Ananya is 9 years old. Meera is 2 years older than Ananya. How old is Meera? (a) not enough info (b) 12 (c) 2 (d) 11
20. 20.🧩 Aarav is 11 years old. Diya is 6 years older than Aarav. How old is Diya? (a) 6 (b) 18 (c) not enough info (d) 17
21. 21.🧩 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
22. 22.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
23. 23.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) dogs hate you (c) that one dog barked (d) never see dogs
24. 24.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
25. 25.🧩 Before solving a word problem, first check… (a) the page number (b) your handwriting (c) the colour of ink (d) what facts are given
26. 26.🧩 A box has 6 rows of laddoos, with 4 in each row. How many laddoos are in the box? (a) 28 (b) 10 (c) not enough info (d) 24
27. 27.🧩 Arjun is 7 years old. Rohan is 9 years older than Arjun. How old is Rohan? (a) 9 (b) 17 (c) 16 (d) not enough info
28. 28.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) guessing (c) asking the whole class (d) asking your pet
29. 29.🧩 The film starts at 3 PM and lasts 1 hour. When does it end? (a) 3 PM (b) not enough info (c) 5 PM (d) 4 PM
30. 30.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
31. 31.📝 What does “evidence” mean? (a) a guess (b) a loud opinion (c) facts that support it (d) a rumour
32. 32.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
33. 33.🧩 Ishaan bought 2 markers and a bag for ₹180 in all. Each marker cost the same. What did one marker cost? (a) ₹90 (b) ₹178 (c) not enough info (d) ₹180
34. 34.🧩 Meera bought 4 notebooks for ₹220 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹55 (c) ₹220 (d) ₹60
35. 35.🔬 Why do scientists repeat an experiment? (a) to waste time (b) to be sure of results (c) for fun only (d) to change answers
36. 36.🧩 Kabir bought 6 kites and a water bottle for ₹120 in all. Each kite cost the same. What did one kite cost? (a) ₹114 (b) not enough info (c) ₹20 (d) ₹120
37. 37.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) 4 PM (b) 3 PM (c) not enough info (d) 2 PM
38. 38.🧩 Vihaan bought 2 kites for ₹50 in all. Each kite cost the same. What did one kite cost? (a) ₹50 (b) ₹25 (c) ₹30 (d) not enough info
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.🧩 Ishaan bought 5 markers for ₹150 in all. Each marker cost the same. What did one marker cost? (a) ₹35 (b) ₹150 (c) ₹30 (d) not enough info

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