Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 138 · 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 asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False
2. 2.🔬 Why do scientists repeat an experiment? (a) to be sure of results (b) to change answers (c) to waste time (d) for fun only
3. 3.🧩 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
4. 4.🧩 Diya bought 5 mangoes and a bag for ₹155 in all. Each mango cost the same. What did one mango cost? (a) ₹31 (b) ₹155 (c) ₹150 (d) not enough info
5. 5.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 8 PM (b) 9 PM (c) not enough info (d) 7 PM
6. 6.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) not enough evidence (b) enough evidence
7. 7.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
8. 8.📝 What does “evidence” mean? (a) a loud opinion (b) a rumour (c) a guess (d) facts that support it
9. 9.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
10. 10.🧩 Rohan bought 2 notebooks for ₹60 in all. Each notebook cost the same. What did one notebook cost? (a) ₹30 (b) ₹35 (c) not enough info (d) ₹60
11. 11.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
12. 12.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) not enough info (b) 4 PM (c) 2 PM (d) 5 PM
13. 13.🧩 A box has 5 rows of apples, with 5 in each row. How many apples are in the box? (a) not enough info (b) 10 (c) 30 (d) 25
14. 14.🧩 A box has 7 rows of guavas, with 9 in each row. How many guavas are in the box? (a) not enough info (b) 16 (c) 72 (d) 63
15. 15.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
16. 16.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 6 PM (b) not enough info (c) 5 PM (d) 4 PM
17. 17.🧩 Arjun is 10 years old. Aarav is older than Arjun. How old is Aarav? (a) 11 (b) 15 (c) not enough info (d) 12
18. 18.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) False (b) True
19. 19.🧩 Meera bought 5 balls and a bag for ₹80 in all. Each ball cost the same. What did one ball cost? (a) ₹16 (b) not enough info (c) ₹80 (d) ₹75
20. 20.🧩 A box has 4 rows of apples, with 4 in each row. How many apples are in the box? (a) 20 (b) 8 (c) not enough info (d) 16
21. 21.🧩 Ananya is 10 years old. Vihaan is 3 years older than Ananya. How old is Vihaan? (a) 3 (b) 13 (c) not enough info (d) 14
22. 22.🧩 The film starts at 2 PM and lasts 3 hours. When does it end? (a) 2 PM (b) 6 PM (c) not enough info (d) 5 PM
23. 23.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
24. 24.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
25. 25.🧩 Meera is 9 years old. Vihaan is 6 years older than Meera. How old is Vihaan? (a) 16 (b) not enough info (c) 15 (d) 6
26. 26.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
27. 27.🧩 Diya bought 4 notebooks and a cap for ₹280 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹276 (c) ₹280 (d) ₹70
28. 28.🧩 Kabir is 6 years old. Diya is 6 years older than Kabir. How old is Diya? (a) 13 (b) not enough info (c) 12 (d) 6
29. 29.🧩 Kabir is 6 years old. Nisha is older than Kabir. How old is Nisha? (a) 11 (b) not enough info (c) 8 (d) 7
30. 30.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
31. 31.🧩 Rohan is 11 years old. Nisha is 6 years older than Rohan. How old is Nisha? (a) 18 (b) not enough info (c) 6 (d) 17
32. 32.🧩 A box has 7 rows of laddoos, with 9 in each row. How many laddoos are in the box? (a) 63 (b) not enough info (c) 16 (d) 72
33. 33.🧩 Diya bought 6 kites and a lunch box for ₹120 in all. Each kite cost the same. What did one kite cost? (a) ₹20 (b) ₹120 (c) not enough info (d) ₹114
34. 34.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
35. 35.🥭 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) no, check more (d) yes, mangoes match
36. 36.🧩 Ishaan bought 3 notebooks for ₹180 in all. Each notebook cost the same. What did one notebook cost? (a) ₹180 (b) ₹65 (c) ₹60 (d) not enough info
37. 37.🧩 A box has 8 rows of apples, with 7 in each row. How many apples are in the box? (a) not enough info (b) 63 (c) 56 (d) 15
38. 38.🧩 A box has 8 rows of eggs, with 6 in each row. How many eggs are in the box? (a) 54 (b) 48 (c) not enough info (d) 14
39. 39.🧩 A box has 6 rows of guavas, with 4 in each row. How many guavas are in the box? (a) 28 (b) not enough info (c) 10 (d) 24
40. 40.🧩 Before solving a word problem, first check… (a) your handwriting (b) the page number (c) the colour of ink (d) what facts are given

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