New Delhi, April 2: The Supreme Court will hear on Wednesday petitions challenging the Central Board of Secondary Education’s (CBSE) March 28 decision to re-conduct the maths exam for Class 10 after its question paper was leaked. A bench, headed by Chief Justice Dipak Misra, on Monday said the matter will be taken up on April 4 after it was mentioned for urgent hearing. Besides challenging the re-conduct of the exam, the petitioners have sought a probe into the leak and declaration of results on the basis of the exams already conducted. The government on March 30 announced the re-examition will be held for Class 12 economics paper throughout the country on April 25 while a fresh test for Class 10 maths paper will be held only in Delhi, NCR and Harya in July.