Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 857 · 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.🧩 Before solving a word problem, first check… (a) the page number (b) the colour of ink (c) your handwriting (d) what facts are given
2. 2.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
3. 3.🧩 Tara is 9 years old. Ananya is 8 years older than Tara. How old is Ananya? (a) not enough info (b) 17 (c) 8 (d) 18
4. 4.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
5. 5.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
6. 6.True or false: “One mango in the box was sour, so all the mangoes are sour.” does not give enough evidence. (a) False (b) True
7. 7.🧩 Saanvi is 6 years old. Ishaan is older than Saanvi. How old is Ishaan? (a) 11 (b) 7 (c) 8 (d) not enough info
8. 8.🧩 A box has 8 rows of guavas, with 5 in each row. How many guavas are in the box? (a) 40 (b) 13 (c) 45 (d) not enough info
9. 9.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
10. 10.🧩 Rohan bought 2 balls and a water bottle for ₹130 in all. Each ball cost the same. What did one ball cost? (a) ₹65 (b) ₹130 (c) not enough info (d) ₹128
11. 11.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) False (b) True
12. 12.🧩 Aarav bought 3 balls and a bag for ₹95 in all. Each ball cost the same. What did one ball cost? (a) ₹31 (b) not enough info (c) ₹92 (d) ₹95
13. 13.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
14. 14.🧩 Aarav is 7 years old. Vihaan is 3 years older than Aarav. How old is Vihaan? (a) 3 (b) not enough info (c) 10 (d) 11
15. 15.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
16. 16.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True
17. 17.🧩 A box of oranges has 7 in each row. How many oranges are in the box? (a) 70 (b) not enough info (c) 14 (d) 7
18. 18.🧩 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
19. 19.🧩 Nisha is 8 years old. Diya is 7 years older than Nisha. How old is Diya? (a) not enough info (b) 15 (c) 7 (d) 16
20. 20.🧩 A box of guavas has 5 in each row. How many guavas are in the box? (a) 50 (b) 10 (c) not enough info (d) 5
21. 21.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no, check more (b) no mango is sweet (c) yes, it is certain (d) yes, mangoes match
22. 22.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) asking one friend (c) asking the whole class (d) guessing
23. 23.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
24. 24.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False
25. 25.🧩 The film starts at 4 PM and lasts 3 hours. When does it end? (a) 4 PM (b) 8 PM (c) 7 PM (d) not enough info
26. 26.🧩 A box has 7 rows of laddoos, with 7 in each row. How many laddoos are in the box? (a) 56 (b) not enough info (c) 49 (d) 14
27. 27.🧩 Tara bought 6 balls and a cap for ₹320 in all. Each ball cost the same. What did one ball cost? (a) ₹314 (b) not enough info (c) ₹320 (d) ₹53
28. 28.🧩 Meera is 6 years old. Ananya is older than Meera. How old is Ananya? (a) 8 (b) 7 (c) not enough info (d) 11
29. 29.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
30. 30.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
31. 31.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
32. 32.🧩 A box of apples has 8 in each row. How many apples are in the box? (a) not enough info (b) 8 (c) 80 (d) 16
33. 33.🧩 A box of mangoes has 7 in each row. How many mangoes are in the box? (a) 14 (b) 70 (c) 7 (d) not enough info
34. 34.🧩 Kabir is 11 years old. Meera is older than Kabir. How old is Meera? (a) 12 (b) 13 (c) 16 (d) not enough info
35. 35.🧩 Nisha is 11 years old. Aarav is older than Nisha. How old is Aarav? (a) 13 (b) 16 (c) not enough info (d) 12
36. 36.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
37. 37.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) not enough info (b) 2 PM (c) 4 PM (d) 3 PM
38. 38.🧩 Diya is 9 years old. Vihaan is older than Diya. How old is Vihaan? (a) not enough info (b) 14 (c) 11 (d) 10
39. 39.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) dogs hate you (c) all dogs are mean (d) that one dog barked
40. 40.🧩 A box has 5 rows of apples, with 6 in each row. How many apples are in the box? (a) 11 (b) 36 (c) not enough info (d) 30

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