Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 864 · 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.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
2. 2.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) 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.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
5. 5.🔬 Why do scientists repeat an experiment? (a) to change answers (b) for fun only (c) to waste time (d) to be sure of results
6. 6.🧩 The film starts at 6 PM and lasts 2 hours. When does it end? (a) 8 PM (b) 9 PM (c) not enough info (d) 6 PM
7. 7.🧩 Ishaan bought 2 notebooks and a water bottle for ₹110 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹110 (c) ₹108 (d) ₹55
8. 8.🧩 Saanvi bought 2 mangoes and a water bottle for ₹110 in all. Each mango cost the same. What did one mango cost? (a) ₹108 (b) ₹55 (c) not enough info (d) ₹110
9. 9.🧩 A box of apples has 6 in each row. How many apples are in the box? (a) 60 (b) not enough info (c) 6 (d) 12
10. 10.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
11. 11.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
12. 12.🧩 Saanvi bought 5 notebooks for ₹225 in all. Each notebook cost the same. What did one notebook cost? (a) ₹225 (b) not enough info (c) ₹45 (d) ₹50
13. 13.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) True (b) False
14. 14.🧩 Nisha bought 2 markers for ₹120 in all. Each marker cost the same. What did one marker cost? (a) ₹65 (b) not enough info (c) ₹120 (d) ₹60
15. 15.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False
16. 16.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
17. 17.🧩 Saanvi bought 5 balls for ₹275 in all. Each ball cost the same. What did one ball cost? (a) ₹55 (b) ₹60 (c) not enough info (d) ₹275
18. 18.🧩 Rohan bought 4 balls and a lunch box for ₹80 in all. Each ball cost the same. What did one ball cost? (a) ₹80 (b) ₹20 (c) ₹76 (d) not enough info
19. 19.🥭 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) yes, mangoes match (c) no mango is sweet (d) no, check more
20. 20.🧩 Meera is 12 years old. Kabir is older than Meera. How old is Kabir? (a) 17 (b) not enough info (c) 13 (d) 14
21. 21.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
22. 22.🧩 Before solving a word problem, first check… (a) your handwriting (b) the page number (c) the colour of ink (d) what facts are given
23. 23.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 7 PM (b) 8 PM (c) not enough info (d) 6 PM
24. 24.🧩 A box has 4 rows of apples, with 8 in each row. How many apples are in the box? (a) 12 (b) 40 (c) not enough info (d) 32
25. 25.🧩 The film starts at 6 PM and lasts 3 hours. When does it end? (a) 9 PM (b) 6 PM (c) 10 PM (d) not enough info
26. 26.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
27. 27.🧩 Tara bought 6 kites and a lunch box for ₹140 in all. Each kite cost the same. What did one kite cost? (a) ₹140 (b) ₹23 (c) ₹134 (d) not enough info
28. 28.🧩 Diya is 11 years old. Aarav is older than Diya. How old is Aarav? (a) 12 (b) 13 (c) 16 (d) not enough info
29. 29.🧩 Arjun is 6 years old. Aarav is older than Arjun. How old is Aarav? (a) 8 (b) not enough info (c) 7 (d) 11
30. 30.📝 What does “evidence” mean? (a) a loud opinion (b) facts that support it (c) a rumour (d) a guess
31. 31.🧩 A box has 4 rows of guavas, with 4 in each row. How many guavas are in the box? (a) 20 (b) 8 (c) 16 (d) not enough info
32. 32.🧩 Ananya is 7 years old. Ishaan is 3 years older than Ananya. How old is Ishaan? (a) not enough info (b) 10 (c) 11 (d) 3
33. 33.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
34. 34.🧩 Meera bought 2 balls and a water bottle for ₹190 in all. Each ball cost the same. What did one ball cost? (a) ₹190 (b) not enough info (c) ₹95 (d) ₹188
35. 35.🧩 Ananya is 11 years old. Meera is older than Ananya. How old is Meera? (a) 12 (b) 13 (c) not enough info (d) 16
36. 36.🧩 A box has 5 rows of eggs, with 7 in each row. How many eggs are in the box? (a) not enough info (b) 12 (c) 35 (d) 42
37. 37.🧩 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
38. 38.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 7 PM (b) 6 PM (c) not enough info (d) 5 PM
39. 39.True or false: “One student said the canteen food was cold, so it is always cold.” does not give enough evidence. (a) False (b) True
40. 40.🧩 Diya bought 5 pens for ₹150 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹30 (c) ₹35 (d) ₹150

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