Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 336 · 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.🧩 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
2. 2.🧩 Kabir is 6 years old. Arjun is older than Kabir. How old is Arjun? (a) 11 (b) 8 (c) not enough info (d) 7
3. 3.🧩 A box of laddoos has 9 in each row. How many laddoos are in the box? (a) 9 (b) 18 (c) 90 (d) not enough info
4. 4.🧩 Arjun is 7 years old. Kabir is 7 years older than Arjun. How old is Kabir? (a) 7 (b) 15 (c) 14 (d) not enough info
5. 5.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False
6. 6.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) False (b) True
7. 7.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
8. 8.🧩 Meera bought 5 markers and a cap for ₹370 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹74 (c) ₹370 (d) ₹365
9. 9.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) asking your pet (c) guessing (d) asking the whole class
10. 10.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True
11. 11.🧩 Nisha bought 4 markers and a lunch box for ₹160 in all. Each marker cost the same. What did one marker cost? (a) ₹40 (b) ₹156 (c) ₹160 (d) not enough info
12. 12.🧩 A box of eggs has 4 in each row. How many eggs are in the box? (a) 4 (b) not enough info (c) 8 (d) 40
13. 13.🧩 The film starts at 4 PM and lasts 3 hours. When does it end? (a) 7 PM (b) 4 PM (c) not enough info (d) 8 PM
14. 14.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
15. 15.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
16. 16.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) False (b) True
17. 17.🧩 Diya bought 3 balls for ₹45 in all. Each ball cost the same. What did one ball cost? (a) ₹20 (b) ₹45 (c) ₹15 (d) not enough info
18. 18.🧩 A box has 3 rows of guavas, with 9 in each row. How many guavas are in the box? (a) 27 (b) not enough info (c) 12 (d) 36
19. 19.🧩 The film starts at 5 PM and lasts 3 hours. When does it end? (a) 5 PM (b) 9 PM (c) not enough info (d) 8 PM
20. 20.🧩 The film starts at 4 PM and lasts 2 hours. When does it end? (a) 6 PM (b) not enough info (c) 7 PM (d) 4 PM
21. 21.🧩 Kabir is 12 years old. Aarav is 5 years older than Kabir. How old is Aarav? (a) 18 (b) 17 (c) 5 (d) not enough info
22. 22.🧩 A box has 6 rows of eggs, with 8 in each row. How many eggs are in the box? (a) not enough info (b) 56 (c) 14 (d) 48
23. 23.🧩 Ananya is 8 years old. Aarav is 4 years older than Ananya. How old is Aarav? (a) 4 (b) 13 (c) not enough info (d) 12
24. 24.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
25. 25.🧩 A box has 4 rows of apples, with 7 in each row. How many apples are in the box? (a) 35 (b) 28 (c) not enough info (d) 11
26. 26.🧩 A box of apples has 9 in each row. How many apples are in the box? (a) 90 (b) not enough info (c) 9 (d) 18
27. 27.🧩 Rohan bought 2 pens and a cap for ₹120 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹60 (c) ₹120 (d) ₹118
28. 28.🧩 Saanvi bought 5 balls and a bag for ₹280 in all. Each ball cost the same. What did one ball cost? (a) ₹56 (b) ₹280 (c) ₹275 (d) not enough info
29. 29.🧩 Kabir is 11 years old. Ishaan is older than Kabir. How old is Ishaan? (a) 13 (b) 16 (c) 12 (d) not enough info
30. 30.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to be sure of results (c) to change answers (d) to waste time
31. 31.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no mango is sweet (b) yes, mangoes match (c) no, check more (d) yes, it is certain
32. 32.🧩 Before solving a word problem, first check… (a) what facts are given (b) the colour of ink (c) your handwriting (d) the page number
33. 33.🧩 A box of mangoes has 4 in each row. How many mangoes are in the box? (a) not enough info (b) 8 (c) 4 (d) 40
34. 34.🧩 Tara bought 2 notebooks for ₹100 in all. Each notebook cost the same. What did one notebook cost? (a) ₹50 (b) ₹55 (c) not enough info (d) ₹100
35. 35.🧩 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
36. 36.🧩 Tara is 10 years old. Nisha is 3 years older than Tara. How old is Nisha? (a) 14 (b) 3 (c) 13 (d) not enough info
37. 37.🧩 Saanvi bought 3 kites and a bag for ₹235 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹232 (c) ₹78 (d) ₹235
38. 38.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
39. 39.🧩 A box has 5 rows of guavas, with 8 in each row. How many guavas are in the box? (a) 40 (b) 13 (c) 48 (d) not enough info
40. 40.🧩 Saanvi is 7 years old. Nisha is 2 years older than Saanvi. How old is Nisha? (a) not enough info (b) 9 (c) 2 (d) 10

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