Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 395 · 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 checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
2. 2.🧩 Diya bought 2 markers and a water bottle for ₹50 in all. Each marker cost the same. What did one marker cost? (a) ₹48 (b) ₹50 (c) not enough info (d) ₹25
3. 3.🧩 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
4. 4.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
5. 5.🧩 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
6. 6.🧩 A box has 6 rows of mangoes, with 6 in each row. How many mangoes are in the box? (a) not enough info (b) 12 (c) 42 (d) 36
7. 7.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) not enough info (b) 5 PM (c) 6 PM (d) 7 PM
8. 8.🧩 Ananya bought 5 notebooks and a bag for ₹225 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹220 (c) ₹45 (d) ₹225
9. 9.🧩 A box of guavas has 6 in each row. How many guavas are in the box? (a) 60 (b) not enough info (c) 6 (d) 12
10. 10.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 3 PM (b) 4 PM (c) 5 PM (d) not enough info
11. 11.🧩 A box of apples has 8 in each row. How many apples are in the box? (a) 8 (b) 16 (c) not enough info (d) 80
12. 12.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
13. 13.🐕 One dog barked at you. What is the fair conclusion? (a) that one dog barked (b) never see dogs (c) dogs hate you (d) all dogs are mean
14. 14.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
15. 15.🥭 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
16. 16.🧩 The film starts at 4 PM and lasts 2 hours. When does it end? (a) not enough info (b) 4 PM (c) 6 PM (d) 7 PM
17. 17.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
18. 18.🧩 A box of laddoos has 4 in each row. How many laddoos are in the box? (a) 8 (b) 4 (c) 40 (d) not enough info
19. 19.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 9 PM (b) 8 PM (c) not enough info (d) 7 PM
20. 20.🧩 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
21. 21.🧩 Ishaan bought 5 markers for ₹175 in all. Each marker cost the same. What did one marker cost? (a) ₹35 (b) ₹40 (c) ₹175 (d) not enough info
22. 22.🧩 A box has 7 rows of mangoes, with 7 in each row. How many mangoes are in the box? (a) 56 (b) 49 (c) not enough info (d) 14
23. 23.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
24. 24.🧩 A box of laddoos has 6 in each row. How many laddoos are in the box? (a) 12 (b) 6 (c) 60 (d) not enough info
25. 25.🧩 Rohan is 10 years old. Aarav is 9 years older than Rohan. How old is Aarav? (a) not enough info (b) 19 (c) 20 (d) 9
26. 26.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True
27. 27.🧩 Kabir bought 2 kites and a lunch box for ₹170 in all. Each kite cost the same. What did one kite cost? (a) ₹168 (b) ₹170 (c) not enough info (d) ₹85
28. 28.🧩 A box of apples has 9 in each row. How many apples are in the box? (a) 18 (b) not enough info (c) 9 (d) 90
29. 29.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
30. 30.🧩 Rohan bought 4 pens for ₹200 in all. Each pen cost the same. What did one pen cost? (a) ₹200 (b) not enough info (c) ₹55 (d) ₹50
31. 31.🧩 Aarav bought 6 pens and a lunch box for ₹270 in all. Each pen cost the same. What did one pen cost? (a) ₹264 (b) ₹270 (c) not enough info (d) ₹45
32. 32.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
33. 33.🧩 Ishaan is 7 years old. Aarav is 3 years older than Ishaan. How old is Aarav? (a) 11 (b) 3 (c) 10 (d) not enough info
34. 34.🧩 Nisha is 10 years old. Tara is older than Nisha. How old is Tara? (a) 11 (b) 12 (c) not enough info (d) 15
35. 35.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
36. 36.🧩 Before solving a word problem, first check… (a) your handwriting (b) the page number (c) the colour of ink (d) what facts are given
37. 37.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
38. 38.🧩 Ishaan bought 5 notebooks and a cap for ₹265 in all. Each notebook cost the same. What did one notebook cost? (a) ₹53 (b) ₹265 (c) ₹260 (d) not enough info
39. 39.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
40. 40.📊 Which gives the best evidence about the class’s favourite game? (a) asking the whole class (b) guessing (c) asking your pet (d) asking one friend

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