Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 172 · 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 checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
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.🥭 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) no mango is sweet (c) no, check more (d) yes, mangoes match
4. 4.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) not enough info (b) 2 PM (c) 4 PM (d) 5 PM
5. 5.🧩 Arjun bought 3 balls and a lunch box for ₹215 in all. Each ball cost the same. What did one ball cost? (a) ₹71 (b) not enough info (c) ₹215 (d) ₹212
6. 6.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
7. 7.🧩 Nisha bought 2 notebooks and a bag for ₹90 in all. Each notebook cost the same. What did one notebook cost? (a) ₹88 (b) ₹90 (c) not enough info (d) ₹45
8. 8.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
9. 9.🧩 Tara is 9 years old. Vihaan is 3 years older than Tara. How old is Vihaan? (a) not enough info (b) 12 (c) 13 (d) 3
10. 10.🧩 Before solving a word problem, first check… (a) what facts are given (b) your handwriting (c) the colour of ink (d) the page number
11. 11.🧩 Tara bought 5 notebooks and a lunch box for ₹315 in all. Each notebook cost the same. What did one notebook cost? (a) ₹310 (b) ₹63 (c) not enough info (d) ₹315
12. 12.🔬 Why do scientists repeat an experiment? (a) to waste time (b) to be sure of results (c) to change answers (d) for fun only
13. 13.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
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.🧩 Vihaan bought 5 markers and a cap for ₹240 in all. Each marker cost the same. What did one marker cost? (a) ₹235 (b) ₹240 (c) not enough info (d) ₹48
16. 16.🧩 A box of apples has 6 in each row. How many apples are in the box? (a) 60 (b) 6 (c) 12 (d) not enough info
17. 17.📝 What does “evidence” mean? (a) facts that support it (b) a loud opinion (c) a guess (d) a rumour
18. 18.🧩 Ishaan is 12 years old. Kabir is older than Ishaan. How old is Kabir? (a) 17 (b) 14 (c) 13 (d) not enough info
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.🧩 Meera is 12 years old. Vihaan is 3 years older than Meera. How old is Vihaan? (a) 3 (b) 15 (c) not enough info (d) 16
21. 21.🧩 Aarav bought 5 mangoes and a cap for ₹220 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹44 (c) ₹220 (d) ₹215
22. 22.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
23. 23.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 7 PM (b) 8 PM (c) 6 PM (d) not enough info
24. 24.🧩 Arjun bought 4 balls for ₹200 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹200 (c) ₹55 (d) ₹50
25. 25.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
26. 26.🧩 Kabir bought 4 markers and a water bottle for ₹140 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹35 (c) ₹140 (d) ₹136
27. 27.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) not enough info (b) 8 PM (c) 7 PM (d) 9 PM
28. 28.🧩 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
29. 29.🧩 Arjun is 12 years old. Rohan is older than Arjun. How old is Rohan? (a) 13 (b) 17 (c) not enough info (d) 14
30. 30.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
31. 31.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) False (b) True
32. 32.🧩 Ananya bought 3 pens for ₹120 in all. Each pen cost the same. What did one pen cost? (a) ₹45 (b) ₹120 (c) not enough info (d) ₹40
33. 33.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
34. 34.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
35. 35.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False
36. 36.🧩 Arjun bought 4 markers and a bag for ₹100 in all. Each marker cost the same. What did one marker cost? (a) ₹25 (b) ₹96 (c) ₹100 (d) not enough info
37. 37.🧩 A box of laddoos has 5 in each row. How many laddoos are in the box? (a) 10 (b) not enough info (c) 50 (d) 5
38. 38.🧩 Aarav is 12 years old. Tara is older than Aarav. How old is Tara? (a) 17 (b) not enough info (c) 13 (d) 14
39. 39.🧩 A box has 6 rows of guavas, with 9 in each row. How many guavas are in the box? (a) not enough info (b) 54 (c) 63 (d) 15
40. 40.🧩 Nisha bought 5 notebooks and a bag for ₹330 in all. Each notebook cost the same. What did one notebook cost? (a) ₹330 (b) ₹325 (c) ₹66 (d) not enough info

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