Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 714 · 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.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
3. 3.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
4. 4.🧩 Vihaan bought 4 balls for ₹80 in all. Each ball cost the same. What did one ball cost? (a) ₹80 (b) ₹20 (c) ₹25 (d) not enough info
5. 5.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
6. 6.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
7. 7.🧩 Aarav bought 2 notebooks for ₹80 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹45 (c) ₹80 (d) ₹40
8. 8.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
9. 9.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
10. 10.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
11. 11.🧩 Ananya bought 3 notebooks and a cap for ₹235 in all. Each notebook cost the same. What did one notebook cost? (a) ₹232 (b) ₹235 (c) not enough info (d) ₹78
12. 12.🧩 Saanvi is 10 years old. Aarav is 3 years older than Saanvi. How old is Aarav? (a) 14 (b) not enough info (c) 13 (d) 3
13. 13.🧩 A box has 8 rows of eggs, with 5 in each row. How many eggs are in the box? (a) 45 (b) 13 (c) not enough info (d) 40
14. 14.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
15. 15.🧩 A box of mangoes has 7 in each row. How many mangoes are in the box? (a) 14 (b) 7 (c) 70 (d) not enough info
16. 16.🧩 Before solving a word problem, first check… (a) the colour of ink (b) the page number (c) what facts are given (d) your handwriting
17. 17.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
18. 18.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no mango is sweet (b) yes, it is certain (c) no, check more (d) yes, mangoes match
19. 19.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
20. 20.🧩 Tara is 10 years old. Rohan is 3 years older than Tara. How old is Rohan? (a) 3 (b) 14 (c) not enough info (d) 13
21. 21.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
22. 22.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
23. 23.🧩 Nisha is 8 years old. Ishaan is older than Nisha. How old is Ishaan? (a) 13 (b) 9 (c) 10 (d) not enough info
24. 24.🧩 Rohan bought 2 balls and a cap for ₹140 in all. Each ball cost the same. What did one ball cost? (a) ₹140 (b) ₹138 (c) not enough info (d) ₹70
25. 25.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False
26. 26.🧩 A box of eggs has 8 in each row. How many eggs are in the box? (a) 8 (b) not enough info (c) 16 (d) 80
27. 27.🧩 Vihaan bought 2 pens for ₹50 in all. Each pen cost the same. What did one pen cost? (a) ₹30 (b) not enough info (c) ₹25 (d) ₹50
28. 28.🧩 A box of guavas has 5 in each row. How many guavas are in the box? (a) not enough info (b) 50 (c) 10 (d) 5
29. 29.🧩 A box has 3 rows of guavas, with 6 in each row. How many guavas are in the box? (a) 24 (b) 18 (c) 9 (d) not enough info
30. 30.🧩 The film starts at 6 PM and lasts 3 hours. When does it end? (a) 10 PM (b) 6 PM (c) not enough info (d) 9 PM
31. 31.🧩 Rohan bought 3 pens for ₹45 in all. Each pen cost the same. What did one pen cost? (a) ₹20 (b) ₹45 (c) ₹15 (d) not enough info
32. 32.🧩 Ananya bought 4 balls for ₹200 in all. Each ball cost the same. What did one ball cost? (a) ₹55 (b) ₹50 (c) not enough info (d) ₹200
33. 33.🧩 A box of mangoes has 8 in each row. How many mangoes are in the box? (a) 80 (b) 8 (c) 16 (d) not enough info
34. 34.🧩 Kabir bought 3 markers for ₹60 in all. Each marker cost the same. What did one marker cost? (a) ₹25 (b) ₹20 (c) ₹60 (d) not enough info
35. 35.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
36. 36.🧩 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
37. 37.🧩 Arjun bought 2 kites and a cap for ₹100 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹100 (c) ₹98 (d) ₹50
38. 38.🧩 The film starts at 6 PM and lasts 2 hours. When does it end? (a) not enough info (b) 8 PM (c) 6 PM (d) 9 PM
39. 39.🧩 Arjun bought 6 balls for ₹330 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹60 (c) ₹330 (d) ₹55
40. 40.🧩 A box of mangoes has 9 in each row. How many mangoes are in the box? (a) 18 (b) 9 (c) 90 (d) not enough info

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