Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 663 · 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.🔬 Why do scientists repeat an experiment? (a) to waste time (b) for fun only (c) to be sure of results (d) to change answers
2. 2.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
3. 3.🧩 Before solving a word problem, first check… (a) your handwriting (b) what facts are given (c) the colour of ink (d) the page number
4. 4.🧩 Diya bought 2 balls for ₹40 in all. Each ball cost the same. What did one ball cost? (a) ₹25 (b) ₹20 (c) not enough info (d) ₹40
5. 5.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
6. 6.🧩 Rohan is 10 years old. Ishaan is older than Rohan. How old is Ishaan? (a) 15 (b) 11 (c) not enough info (d) 12
7. 7.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) True (b) False
8. 8.🧩 A box has 6 rows of eggs, with 4 in each row. How many eggs are in the box? (a) 24 (b) 28 (c) 10 (d) not enough info
9. 9.📝 What does “evidence” mean? (a) facts that support it (b) a rumour (c) a guess (d) a loud opinion
10. 10.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True
11. 11.🧩 A box has 7 rows of eggs, with 7 in each row. How many eggs are in the box? (a) not enough info (b) 49 (c) 14 (d) 56
12. 12.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
13. 13.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
14. 14.🧩 A box has 3 rows of eggs, with 9 in each row. How many eggs are in the box? (a) 36 (b) 12 (c) 27 (d) not enough info
15. 15.🧩 A box has 8 rows of eggs, with 5 in each row. How many eggs are in the box? (a) 45 (b) 40 (c) 13 (d) not enough info
16. 16.🧩 A box of oranges has 5 in each row. How many oranges are in the box? (a) not enough info (b) 10 (c) 50 (d) 5
17. 17.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
18. 18.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
19. 19.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
20. 20.🧩 Diya bought 6 balls for ₹300 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹50 (c) ₹300 (d) ₹55
21. 21.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) False (b) True
22. 22.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking one friend (c) asking your pet (d) asking the whole class
23. 23.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) True (b) False
24. 24.🧩 A box of apples has 7 in each row. How many apples are in the box? (a) not enough info (b) 70 (c) 7 (d) 14
25. 25.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) False (b) True
26. 26.🧩 Rohan is 8 years old. Kabir is 8 years older than Rohan. How old is Kabir? (a) 16 (b) 17 (c) not enough info (d) 8
27. 27.🧩 Ananya is 11 years old. Diya is 8 years older than Ananya. How old is Diya? (a) 8 (b) 20 (c) 19 (d) not enough info
28. 28.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
29. 29.🧩 Kabir bought 4 kites for ₹240 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹240 (c) ₹60 (d) ₹65
30. 30.🐕 One dog barked at you. What is the fair conclusion? (a) that one dog barked (b) all dogs are mean (c) dogs hate you (d) never see dogs
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) yes, it is certain (d) no, check more
32. 32.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
33. 33.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
34. 34.🧩 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
35. 35.🧩 Meera bought 5 markers and a water bottle for ₹195 in all. Each marker cost the same. What did one marker cost? (a) ₹195 (b) not enough info (c) ₹39 (d) ₹190
36. 36.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
37. 37.🧩 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
38. 38.🧩 Saanvi is 7 years old. Arjun is 8 years older than Saanvi. How old is Arjun? (a) 15 (b) 16 (c) not enough info (d) 8
39. 39.🧩 Ishaan is 6 years old. Tara is 4 years older than Ishaan. How old is Tara? (a) not enough info (b) 4 (c) 11 (d) 10
40. 40.🧩 Nisha bought 6 notebooks for ₹360 in all. Each notebook cost the same. What did one notebook cost? (a) ₹60 (b) ₹65 (c) ₹360 (d) not enough info

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