Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 889 · 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? “We tried the new route for 10 days, and it was faster every day.” (a) enough evidence (b) not enough evidence
2. 2.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
3. 3.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
4. 4.🧩 Ananya bought 6 kites and a water bottle for ₹140 in all. Each kite cost the same. What did one kite cost? (a) ₹140 (b) ₹23 (c) not enough info (d) ₹134
5. 5.🧩 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
6. 6.🥭 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, it is certain (c) no, check more (d) yes, mangoes match
7. 7.🧩 A box has 4 rows of eggs, with 4 in each row. How many eggs are in the box? (a) 16 (b) not enough info (c) 20 (d) 8
8. 8.🔬 Why do scientists repeat an experiment? (a) to change answers (b) to be sure of results (c) to waste time (d) for fun only
9. 9.🧩 Kabir bought 4 markers for ₹140 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹35 (c) ₹40 (d) ₹140
10. 10.🧩 Before solving a word problem, first check… (a) the page number (b) what facts are given (c) the colour of ink (d) your handwriting
11. 11.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
12. 12.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
13. 13.📊 Which gives the best evidence about the class’s favourite game? (a) asking the whole class (b) asking your pet (c) asking one friend (d) guessing
14. 14.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 9 PM (b) 8 PM (c) not enough info (d) 7 PM
15. 15.🧩 Saanvi bought 2 mangoes for ₹50 in all. Each mango cost the same. What did one mango cost? (a) ₹50 (b) ₹25 (c) ₹30 (d) not enough info
16. 16.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
17. 17.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) all dogs are mean (c) never see dogs (d) that one dog barked
18. 18.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) False (b) True
19. 19.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) False (b) True
20. 20.🧩 Rohan is 10 years old. Ananya is older than Rohan. How old is Ananya? (a) 15 (b) 11 (c) 12 (d) not enough info
21. 21.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
22. 22.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
23. 23.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
24. 24.🧩 Saanvi is 12 years old. Meera is 4 years older than Saanvi. How old is Meera? (a) not enough info (b) 16 (c) 4 (d) 17
25. 25.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) not enough info (b) 7 PM (c) 6 PM (d) 8 PM
26. 26.🧩 Kabir bought 3 pens and a bag for ₹180 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹177 (c) ₹180 (d) ₹60
27. 27.🧩 A box has 6 rows of eggs, with 7 in each row. How many eggs are in the box? (a) 42 (b) 49 (c) 13 (d) not enough info
28. 28.🧩 Rohan bought 4 notebooks for ₹100 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹30 (c) ₹100 (d) ₹25
29. 29.🧩 Ishaan is 10 years old. Kabir is 9 years older than Ishaan. How old is Kabir? (a) 9 (b) 19 (c) not enough info (d) 20
30. 30.🧩 A box has 8 rows of apples, with 9 in each row. How many apples are in the box? (a) 81 (b) 17 (c) 72 (d) not enough info
31. 31.🧩 A box has 4 rows of eggs, with 6 in each row. How many eggs are in the box? (a) 30 (b) not enough info (c) 10 (d) 24
32. 32.🧩 Ishaan bought 3 markers for ₹165 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹55 (c) ₹60 (d) ₹165
33. 33.🧩 Rohan is 9 years old. Diya is 6 years older than Rohan. How old is Diya? (a) not enough info (b) 15 (c) 6 (d) 16
34. 34.True or false: “One student said the canteen food was cold, so it is always cold.” does not give enough evidence. (a) True (b) False
35. 35.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
36. 36.🧩 Ananya is 7 years old. Vihaan is 9 years older than Ananya. How old is Vihaan? (a) 16 (b) 17 (c) not enough info (d) 9
37. 37.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True
38. 38.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
39. 39.🧩 Saanvi bought 3 balls and a water bottle for ₹150 in all. Each ball cost the same. What did one ball cost? (a) ₹150 (b) ₹50 (c) not enough info (d) ₹147
40. 40.🧩 Tara is 11 years old. Kabir is older than Tara. How old is Kabir? (a) not enough info (b) 12 (c) 16 (d) 13

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