Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 345 · 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.🧩 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
3. 3.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
4. 4.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
5. 5.🧩 Arjun bought 4 markers for ₹40 in all. Each marker cost the same. What did one marker cost? (a) ₹40 (b) ₹15 (c) ₹10 (d) not enough info
6. 6.🧩 Vihaan bought 3 balls for ₹30 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹10 (c) ₹30 (d) ₹15
7. 7.🧩 Arjun bought 4 notebooks and a lunch box for ₹160 in all. Each notebook cost the same. What did one notebook cost? (a) ₹40 (b) ₹160 (c) not enough info (d) ₹156
8. 8.🧩 Ishaan is 9 years old. Arjun is 9 years older than Ishaan. How old is Arjun? (a) not enough info (b) 9 (c) 19 (d) 18
9. 9.🧩 Aarav bought 3 markers and a water bottle for ₹225 in all. Each marker cost the same. What did one marker cost? (a) ₹75 (b) ₹225 (c) not enough info (d) ₹222
10. 10.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False
11. 11.True or false: “One mango in the box was sour, so all the mangoes are sour.” does not give enough evidence. (a) True (b) False
12. 12.🧩 Before solving a word problem, first check… (a) what facts are given (b) the colour of ink (c) the page number (d) your handwriting
13. 13.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
14. 14.🧩 Saanvi bought 2 mangoes for ₹50 in all. Each mango cost the same. What did one mango cost? (a) ₹30 (b) not enough info (c) ₹50 (d) ₹25
15. 15.🧩 A box has 3 rows of apples, with 7 in each row. How many apples are in the box? (a) 10 (b) not enough info (c) 21 (d) 28
16. 16.🧩 Vihaan is 9 years old. Kabir is older than Vihaan. How old is Kabir? (a) 10 (b) 14 (c) not enough info (d) 11
17. 17.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) all dogs are mean (c) never see dogs (d) that one dog barked
18. 18.📝 What does “evidence” mean? (a) facts that support it (b) a loud opinion (c) a rumour (d) a guess
19. 19.🧩 Diya bought 2 markers and a cap for ₹140 in all. Each marker cost the same. What did one marker cost? (a) ₹140 (b) not enough info (c) ₹138 (d) ₹70
20. 20.🧩 A box of laddoos has 6 in each row. How many laddoos are in the box? (a) 60 (b) 6 (c) 12 (d) not enough info
21. 21.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
22. 22.🧩 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
23. 23.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) 2 PM (b) 5 PM (c) not enough info (d) 4 PM
24. 24.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) False (b) True
25. 25.🧩 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
26. 26.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
27. 27.🧩 A box has 7 rows of mangoes, with 6 in each row. How many mangoes are in the box? (a) 48 (b) 42 (c) 13 (d) not enough info
28. 28.🥭 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
29. 29.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
30. 30.🧩 Tara bought 4 notebooks for ₹220 in all. Each notebook cost the same. What did one notebook cost? (a) ₹55 (b) ₹60 (c) not enough info (d) ₹220
31. 31.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
32. 32.🧩 Aarav bought 3 balls and a bag for ₹125 in all. Each ball cost the same. What did one ball cost? (a) ₹41 (b) ₹122 (c) ₹125 (d) not enough info
33. 33.🧩 A box of mangoes has 4 in each row. How many mangoes are in the box? (a) 40 (b) not enough info (c) 4 (d) 8
34. 34.🧩 The film starts at 6 PM and lasts 2 hours. When does it end? (a) 9 PM (b) 8 PM (c) not enough info (d) 6 PM
35. 35.🧩 A box of mangoes has 9 in each row. How many mangoes are in the box? (a) 9 (b) not enough info (c) 90 (d) 18
36. 36.🧩 The film starts at 4 PM and lasts 2 hours. When does it end? (a) not enough info (b) 7 PM (c) 6 PM (d) 4 PM
37. 37.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
38. 38.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
39. 39.🧩 Kabir bought 4 markers for ₹100 in all. Each marker cost the same. What did one marker cost? (a) ₹25 (b) ₹30 (c) not enough info (d) ₹100
40. 40.🧩 Ishaan bought 2 kites for ₹80 in all. Each kite cost the same. What did one kite cost? (a) ₹40 (b) not enough info (c) ₹80 (d) ₹45

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