Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 637 · 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.🧩 Rohan bought 3 mangoes and a water bottle for ₹105 in all. Each mango cost the same. What did one mango cost? (a) ₹35 (b) not enough info (c) ₹105 (d) ₹102
2. 2.🧩 Diya bought 4 markers and a cap for ₹330 in all. Each marker cost the same. What did one marker cost? (a) ₹82 (b) ₹326 (c) ₹330 (d) not enough info
3. 3.🧩 Diya is 11 years old. Kabir is 2 years older than Diya. How old is Kabir? (a) 13 (b) 2 (c) not enough info (d) 14
4. 4.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
5. 5.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
6. 6.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) False (b) True
7. 7.🧩 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
8. 8.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
9. 9.🧩 Meera bought 6 kites and a water bottle for ₹210 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹35 (c) ₹204 (d) ₹210
10. 10.🧩 Kabir is 12 years old. Vihaan is older than Kabir. How old is Vihaan? (a) 14 (b) 13 (c) 17 (d) not enough info
11. 11.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
12. 12.🐕 One dog barked at you. What is the fair conclusion? (a) that one dog barked (b) all dogs are mean (c) never see dogs (d) dogs hate you
13. 13.🧩 Before solving a word problem, first check… (a) the colour of ink (b) your handwriting (c) what facts are given (d) the page number
14. 14.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True
15. 15.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
16. 16.🧩 Meera is 12 years old. Rohan is 6 years older than Meera. How old is Rohan? (a) 19 (b) not enough info (c) 18 (d) 6
17. 17.🧩 Meera is 8 years old. Nisha is 4 years older than Meera. How old is Nisha? (a) 13 (b) 4 (c) 12 (d) not enough info
18. 18.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) True (b) False
19. 19.🥭 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) yes, mangoes match (d) no, check more
20. 20.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
21. 21.🧩 A box of apples has 8 in each row. How many apples are in the box? (a) 16 (b) 8 (c) 80 (d) not enough info
22. 22.🧩 A box of eggs has 6 in each row. How many eggs are in the box? (a) 12 (b) 60 (c) not enough info (d) 6
23. 23.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) 4 PM (b) 5 PM (c) 6 PM (d) not enough info
24. 24.🧩 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
25. 25.🧩 Ishaan bought 2 markers for ₹20 in all. Each marker cost the same. What did one marker cost? (a) ₹10 (b) ₹15 (c) not enough info (d) ₹20
26. 26.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) asking the whole class (c) guessing (d) asking your pet
27. 27.🧩 Kabir bought 2 markers and a bag for ₹80 in all. Each marker cost the same. What did one marker cost? (a) ₹78 (b) ₹80 (c) ₹40 (d) not enough info
28. 28.🧩 Kabir bought 6 pens and a water bottle for ₹210 in all. Each pen cost the same. What did one pen cost? (a) ₹35 (b) ₹204 (c) ₹210 (d) not enough info
29. 29.🧩 A box of eggs has 4 in each row. How many eggs are in the box? (a) 4 (b) 8 (c) 40 (d) not enough info
30. 30.🧩 Saanvi bought 4 mangoes and a cap for ₹260 in all. Each mango cost the same. What did one mango cost? (a) ₹65 (b) ₹260 (c) not enough info (d) ₹256
31. 31.🧩 A box has 8 rows of eggs, with 6 in each row. How many eggs are in the box? (a) not enough info (b) 48 (c) 14 (d) 54
32. 32.🧩 Tara is 6 years old. Arjun is older than Tara. How old is Arjun? (a) 7 (b) 8 (c) 11 (d) not enough info
33. 33.🧩 The film starts at 5 PM and lasts 3 hours. When does it end? (a) 5 PM (b) 9 PM (c) 8 PM (d) not enough info
34. 34.🧩 Rohan bought 4 notebooks for ₹120 in all. Each notebook cost the same. What did one notebook cost? (a) ₹35 (b) ₹120 (c) not enough info (d) ₹30
35. 35.🧩 A box of mangoes has 5 in each row. How many mangoes are in the box? (a) 50 (b) not enough info (c) 10 (d) 5
36. 36.🧩 A box of eggs has 5 in each row. How many eggs are in the box? (a) 10 (b) not enough info (c) 50 (d) 5
37. 37.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
38. 38.🧩 A box has 4 rows of apples, with 6 in each row. How many apples are in the box? (a) 30 (b) 24 (c) 10 (d) not enough info
39. 39.🧩 Ananya bought 4 notebooks for ₹120 in all. Each notebook cost the same. What did one notebook cost? (a) ₹35 (b) ₹30 (c) ₹120 (d) not enough info
40. 40.🔬 Why do scientists repeat an experiment? (a) to be sure of results (b) to waste time (c) for fun only (d) to change answers

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