Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 203 · 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.🧩 Saanvi bought 6 kites and a water bottle for ₹320 in all. Each kite cost the same. What did one kite cost? (a) ₹320 (b) not enough info (c) ₹314 (d) ₹53
2. 2.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
3. 3.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
4. 4.🧩 Aarav bought 2 balls and a bag for ₹130 in all. Each ball cost the same. What did one ball cost? (a) ₹65 (b) ₹130 (c) not enough info (d) ₹128
5. 5.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) yes, it is certain (b) no mango is sweet (c) yes, mangoes match (d) no, check more
6. 6.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) 7 PM (b) 5 PM (c) not enough info (d) 6 PM
7. 7.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
8. 8.🧩 Aarav is 6 years old. Meera is 4 years older than Aarav. How old is Meera? (a) not enough info (b) 4 (c) 10 (d) 11
9. 9.🧩 A box has 6 rows of laddoos, with 9 in each row. How many laddoos are in the box? (a) not enough info (b) 15 (c) 63 (d) 54
10. 10.🧩 A box of mangoes has 9 in each row. How many mangoes are in the box? (a) 18 (b) 90 (c) 9 (d) not enough info
11. 11.📊 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
12. 12.🧩 Diya bought 4 kites for ₹220 in all. Each kite cost the same. What did one kite cost? (a) ₹55 (b) ₹220 (c) ₹60 (d) not enough info
13. 13.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 5 PM (b) 6 PM (c) 4 PM (d) not enough info
14. 14.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
15. 15.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
16. 16.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 7 PM (b) not enough info (c) 8 PM (d) 9 PM
17. 17.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 7 PM (b) not enough info (c) 8 PM (d) 6 PM
18. 18.🧩 Arjun bought 4 markers for ₹60 in all. Each marker cost the same. What did one marker cost? (a) ₹15 (b) ₹20 (c) ₹60 (d) not enough info
19. 19.🧩 Before solving a word problem, first check… (a) what facts are given (b) the colour of ink (c) the page number (d) your handwriting
20. 20.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) False (b) True
21. 21.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) False (b) True
22. 22.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
23. 23.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
24. 24.🔬 Why do scientists repeat an experiment? (a) to be sure of results (b) to change answers (c) to waste time (d) for fun only
25. 25.🧩 Ishaan bought 2 mangoes and a lunch box for ₹150 in all. Each mango cost the same. What did one mango cost? (a) ₹75 (b) ₹150 (c) ₹148 (d) not enough info
26. 26.🧩 Diya bought 3 pens for ₹150 in all. Each pen cost the same. What did one pen cost? (a) ₹55 (b) not enough info (c) ₹150 (d) ₹50
27. 27.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
28. 28.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
29. 29.🧩 A box has 6 rows of apples, with 5 in each row. How many apples are in the box? (a) 11 (b) not enough info (c) 35 (d) 30
30. 30.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) True (b) False
31. 31.🧩 A box has 5 rows of mangoes, with 4 in each row. How many mangoes are in the box? (a) 24 (b) 9 (c) 20 (d) not enough info
32. 32.🧩 Aarav bought 6 notebooks for ₹360 in all. Each notebook cost the same. What did one notebook cost? (a) ₹65 (b) ₹360 (c) ₹60 (d) not enough info
33. 33.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
34. 34.🧩 Arjun is 7 years old. Aarav is 4 years older than Arjun. How old is Aarav? (a) 4 (b) not enough info (c) 12 (d) 11
35. 35.🧩 A box of eggs has 4 in each row. How many eggs are in the box? (a) 8 (b) not enough info (c) 40 (d) 4
36. 36.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
37. 37.🧩 Kabir is 9 years old. Meera is older than Kabir. How old is Meera? (a) 11 (b) 14 (c) not enough info (d) 10
38. 38.🧩 Kabir bought 6 notebooks for ₹150 in all. Each notebook cost the same. What did one notebook cost? (a) ₹30 (b) ₹25 (c) ₹150 (d) not enough info
39. 39.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
40. 40.🧩 A box of oranges has 6 in each row. How many oranges are in the box? (a) 12 (b) 6 (c) 60 (d) not enough info

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