Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 192 · 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.🧩 The film starts at 6 PM and lasts 2 hours. When does it end? (a) 6 PM (b) not enough info (c) 9 PM (d) 8 PM
2. 2.🧩 Before solving a word problem, first check… (a) the page number (b) the colour of ink (c) what facts are given (d) your handwriting
3. 3.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
4. 4.🧩 Ananya bought 6 notebooks for ₹120 in all. Each notebook cost the same. What did one notebook cost? (a) ₹20 (b) ₹25 (c) not enough info (d) ₹120
5. 5.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
6. 6.📊 Which gives the best evidence about the class’s favourite game? (a) asking the whole class (b) guessing (c) asking one friend (d) asking your pet
7. 7.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) never see dogs (c) all dogs are mean (d) that one dog barked
8. 8.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
9. 9.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
10. 10.🧩 Ishaan bought 6 notebooks for ₹330 in all. Each notebook cost the same. What did one notebook cost? (a) ₹330 (b) ₹55 (c) not enough info (d) ₹60
11. 11.True or false: “My friend didn’t like the book, so the book is bad for everyone.” does not give enough evidence. (a) True (b) False
12. 12.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
13. 13.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
14. 14.🧩 Aarav bought 2 notebooks for ₹120 in all. Each notebook cost the same. What did one notebook cost? (a) ₹60 (b) not enough info (c) ₹65 (d) ₹120
15. 15.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
16. 16.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) False (b) True
17. 17.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) False (b) True
18. 18.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
19. 19.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
20. 20.🧩 Kabir is 6 years old. Nisha is older than Kabir. How old is Nisha? (a) 8 (b) 7 (c) 11 (d) not enough info
21. 21.🧩 The film starts at 4 PM and lasts 3 hours. When does it end? (a) not enough info (b) 4 PM (c) 8 PM (d) 7 PM
22. 22.🥭 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
23. 23.🧩 Diya is 12 years old. Vihaan is 2 years older than Diya. How old is Vihaan? (a) 2 (b) not enough info (c) 14 (d) 15
24. 24.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
25. 25.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
26. 26.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) False (b) True
27. 27.🧩 Ishaan is 7 years old. Rohan is older than Ishaan. How old is Rohan? (a) 9 (b) not enough info (c) 12 (d) 8
28. 28.🧩 A box has 6 rows of apples, with 4 in each row. How many apples are in the box? (a) 28 (b) 10 (c) not enough info (d) 24
29. 29.🧩 Rohan bought 2 markers for ₹40 in all. Each marker cost the same. What did one marker cost? (a) ₹20 (b) ₹25 (c) ₹40 (d) not enough info
30. 30.🧩 A box has 3 rows of apples, with 8 in each row. How many apples are in the box? (a) not enough info (b) 11 (c) 32 (d) 24
31. 31.🧩 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
32. 32.🧩 Saanvi is 8 years old. Vihaan is older than Saanvi. How old is Vihaan? (a) not enough info (b) 9 (c) 10 (d) 13
33. 33.🔬 Why do scientists repeat an experiment? (a) to change answers (b) for fun only (c) to waste time (d) to be sure of results
34. 34.🧩 A box has 7 rows of mangoes, with 4 in each row. How many mangoes are in the box? (a) 28 (b) 32 (c) not enough info (d) 11
35. 35.🧩 Vihaan bought 3 notebooks and a lunch box for ₹145 in all. Each notebook cost the same. What did one notebook cost? (a) ₹142 (b) ₹145 (c) ₹48 (d) not enough info
36. 36.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
37. 37.🧩 A box has 5 rows of mangoes, with 6 in each row. How many mangoes are in the box? (a) not enough info (b) 36 (c) 11 (d) 30
38. 38.🧩 Ishaan bought 5 notebooks and a water bottle for ₹145 in all. Each notebook cost the same. What did one notebook cost? (a) ₹140 (b) not enough info (c) ₹29 (d) ₹145
39. 39.🧩 A box of laddoos has 9 in each row. How many laddoos are in the box? (a) 9 (b) 90 (c) not enough info (d) 18
40. 40.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True

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