Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 650 · 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 tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
2. 2.🔬 Why do scientists repeat an experiment? (a) to waste time (b) for fun only (c) to change answers (d) to be sure of results
3. 3.🧩 Vihaan bought 2 balls for ₹30 in all. Each ball cost the same. What did one ball cost? (a) ₹30 (b) ₹20 (c) not enough info (d) ₹15
4. 4.🧩 A box of mangoes has 9 in each row. How many mangoes are in the box? (a) 90 (b) not enough info (c) 9 (d) 18
5. 5.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
6. 6.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) guessing (c) asking the whole class (d) asking one friend
7. 7.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
8. 8.🧩 A box has 4 rows of apples, with 7 in each row. How many apples are in the box? (a) 35 (b) 11 (c) not enough info (d) 28
9. 9.🧩 Vihaan bought 2 markers for ₹70 in all. Each marker cost the same. What did one marker cost? (a) ₹40 (b) ₹35 (c) ₹70 (d) not enough info
10. 10.🧩 A box has 8 rows of oranges, with 5 in each row. How many oranges are in the box? (a) 40 (b) 45 (c) not enough info (d) 13
11. 11.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
12. 12.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True
13. 13.🧩 A box has 8 rows of mangoes, with 4 in each row. How many mangoes are in the box? (a) 12 (b) 32 (c) not enough info (d) 36
14. 14.🧩 A box has 5 rows of mangoes, with 4 in each row. How many mangoes are in the box? (a) 9 (b) 24 (c) 20 (d) not enough info
15. 15.🧩 A box of guavas has 4 in each row. How many guavas are in the box? (a) 4 (b) not enough info (c) 40 (d) 8
16. 16.🧩 A box of eggs has 8 in each row. How many eggs are in the box? (a) 16 (b) 80 (c) not enough info (d) 8
17. 17.🧩 The film starts at 4 PM and lasts 2 hours. When does it end? (a) 4 PM (b) not enough info (c) 7 PM (d) 6 PM
18. 18.🧩 Ishaan bought 3 notebooks for ₹135 in all. Each notebook cost the same. What did one notebook cost? (a) ₹45 (b) not enough info (c) ₹50 (d) ₹135
19. 19.🧩 Meera bought 3 balls and a cap for ₹205 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹68 (c) ₹205 (d) ₹202
20. 20.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
21. 21.🧩 A box has 3 rows of apples, with 6 in each row. How many apples are in the box? (a) 9 (b) 24 (c) not enough info (d) 18
22. 22.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
23. 23.🧩 Rohan bought 3 notebooks for ₹165 in all. Each notebook cost the same. What did one notebook cost? (a) ₹165 (b) ₹60 (c) not enough info (d) ₹55
24. 24.🧩 Kabir bought 2 balls and a water bottle for ₹150 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹148 (c) ₹150 (d) ₹75
25. 25.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
26. 26.🧩 A box has 4 rows of guavas, with 5 in each row. How many guavas are in the box? (a) 9 (b) 20 (c) not enough info (d) 25
27. 27.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True
28. 28.🧩 A box has 3 rows of apples, with 4 in each row. How many apples are in the box? (a) 16 (b) 7 (c) 12 (d) not enough info
29. 29.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
30. 30.🧩 Aarav bought 4 kites and a cap for ₹230 in all. Each kite cost the same. What did one kite cost? (a) ₹57 (b) ₹230 (c) not enough info (d) ₹226
31. 31.🧩 Diya bought 6 kites for ₹150 in all. Each kite cost the same. What did one kite cost? (a) ₹150 (b) not enough info (c) ₹25 (d) ₹30
32. 32.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
33. 33.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) 8 PM (b) 7 PM (c) 5 PM (d) not enough info
34. 34.🧩 Nisha bought 5 markers and a water bottle for ₹210 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹210 (c) ₹42 (d) ₹205
35. 35.🧩 A box has 7 rows of apples, with 8 in each row. How many apples are in the box? (a) 64 (b) not enough info (c) 56 (d) 15
36. 36.🧩 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
37. 37.🧩 Before solving a word problem, first check… (a) what facts are given (b) the colour of ink (c) the page number (d) your handwriting
38. 38.🧩 A box has 5 rows of eggs, with 6 in each row. How many eggs are in the box? (a) 36 (b) not enough info (c) 11 (d) 30
39. 39.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
40. 40.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) not enough info (b) 5 PM (c) 6 PM (d) 4 PM

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